diff --git a/src/pages/Signin.tsx b/src/pages/Signin.tsx
index 96f825c..6dce41e 100644
--- a/src/pages/Signin.tsx
+++ b/src/pages/Signin.tsx
@@ -3,14 +3,55 @@ import CustomButton from "../components/CustomButton";
 import InputTextfield from "../components/InputTextfield";
 import PenaLogo from "../components/PenaLogo";
 import CloseIcon from "@mui/icons-material/Close";
-import { useState } from "react";
+import { authHandler } from "../utils/api/authenticationHandler";
+import { useNavigate } from "react-router-dom";
+import { useFormik } from "formik";
 
 
+interface Values {
+    email: string;
+    password: string;
+}
+
+// TODO
+function validate(values: Values) {
+    const errors = {} as any;
+    if (!values.email) {
+        errors.email = "Required";
+    } else if (!/^[\w-]{3,25}$/i.test(values.email)) {
+        errors.email = "Invalid username";
+    }
+    if (!values.password) {
+        errors.password = "Required";
+    } else if (!/^[\w-]{8,25}$/i.test(values.password)) {
+        errors.password = "Invalid password";
+    }
+    return errors;
+}
+
 export default function Signin() {
-    const [login, setLogin] = useState<string>("");
-    const [password, setPassword] = useState<string>("");
     const theme = useTheme();
     const upMd = useMediaQuery(theme.breakpoints.up("md"));
+    const navigate = useNavigate();
+    const formik = useFormik<Values>({
+        initialValues: {
+            email: "",
+            password: "",
+        },
+        validate,
+        onSubmit: async (values: Values) => {
+            const result = await authHandler.login({
+                email: values.email,
+                password: values.password,
+            });
+            if (result instanceof Error) {
+                console.log("TODO handle login error");
+                return;
+            }
+            console.log("TODO handle login success feedback");
+            navigate("/");
+        }
+    });
 
     return (
         <Box
@@ -22,6 +63,9 @@ export default function Signin() {
             }}
         >
             <Box
+                component="form"
+                onSubmit={formik.handleSubmit}
+                noValidate
                 sx={{
                     position: "relative",
                     width: upMd ? "600px" : "100%",
@@ -62,20 +106,31 @@ export default function Signin() {
                     }}
                 >Вход в личный кабинет</Typography>
                 <InputTextfield
-                    value={login}
-                    onChange={e => setLogin(e.target.value)}
+                    TextfieldProps={{
+                        value: formik.values.email,
+                        placeholder: "+7 900 000 00 00 или username@penahub.com",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.email && Boolean(formik.errors.email),
+                        helperText: formik.touched.email && formik.errors.email,
+                    }}
+                    onChange={formik.handleChange}
+                    id="email"
                     label="Телефон или E-mail"
-                    placeholder="+7 900 000 00 00 или username@penahub.com"
-                    id="login"
-                    gap={upMd ? "15px" : "12px"}
+                    gap={upMd ? "15px" : "10px"}
                 />
                 <InputTextfield
-                    value={password}
-                    onChange={e => setPassword(e.target.value)}
-                    label="Пароль"
-                    placeholder="Не менее 8 символов"
+                    TextfieldProps={{
+                        value: formik.values.password,
+                        placeholder: "Не менее 8 символов",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.password && Boolean(formik.errors.password),
+                        helperText: formik.touched.password && formik.errors.password,
+                        type: "password",
+                    }}
+                    onChange={formik.handleChange}
                     id="password"
-                    gap={upMd ? "15px" : "12px"}
+                    label="Пароль"
+                    gap={upMd ? "15px" : "10px"}
                 />
                 <CustomButton
                     fullWidth
@@ -87,6 +142,8 @@ export default function Signin() {
                         mt: upMd ? undefined : "10px",
                     }}
                     py="12px"
+                    type="submit"
+                    disabled={formik.isSubmitting}
                 >Войти</CustomButton>
                 <Link href="#"
                     sx={{
diff --git a/src/pages/Signup.tsx b/src/pages/Signup.tsx
index f721722..acf4e54 100644
--- a/src/pages/Signup.tsx
+++ b/src/pages/Signup.tsx
@@ -3,16 +3,66 @@ import CustomButton from "../components/CustomButton";
 import InputTextfield from "../components/InputTextfield";
 import PenaLogo from "../components/PenaLogo";
 import CloseIcon from "@mui/icons-material/Close";
-import { useState } from "react";
+import { authHandler } from "../utils/api/authenticationHandler";
+import { useNavigate } from "react-router-dom";
+import { useFormik } from "formik";
 
 
+interface Values {
+    login: string;
+    email: string;
+    phoneNumber: string;
+    password: string;
+    repeatPassword: string;
+}
+
+// TODO
+function validate(values: Values) {
+    const errors = {} as any;
+    if (!values.login) {
+        errors.login = "Required";
+    } else if (!/^[\w-]{3,25}$/i.test(values.login)) {
+        errors.login = "Invalid username";
+    }
+    if (!values.password) {
+        errors.password = "Required";
+    } else if (!/^[\w-]{8,25}$/i.test(values.password)) {
+        errors.password = "Invalid password";
+    }
+    if (values.password !== values.repeatPassword) {
+        errors.repeatPassword = "Passwords do not match";
+    }
+    return errors;
+}
+
 export default function Signup() {
-    const [email, setEmail] = useState<string>("");
-    const [phonenumber, setPhonenumber] = useState<string>("");
-    const [password, setPassword] = useState<string>("");
-    const [repeatPassword, setRepeatPassword] = useState<string>("");
     const theme = useTheme();
     const upMd = useMediaQuery(theme.breakpoints.up("md"));
+    const navigate = useNavigate();
+    const formik = useFormik<Values>({
+        initialValues: {
+            login: "",
+            email: "",
+            phoneNumber: "",
+            password: "",
+            repeatPassword: "",
+        },
+        validate,
+        onSubmit: async (values: Values) => {
+            const result = await authHandler.register({
+                email: values.email,
+                login: values.login,
+                password: values.password,
+                phoneNumber: values.phoneNumber,
+            });
+            if (result instanceof Error) {
+                console.log("TODO handle register error");
+                return;
+            }
+            console.log("TODO handle register success feedback");
+            navigate("/signin");
+        }
+    });
 
     return (
         <Box
@@ -24,6 +74,9 @@ export default function Signup() {
             }}
         >
             <Box
+                component="form"
+                onSubmit={formik.handleSubmit}
+                noValidate
                 sx={{
                     position: "relative",
                     width: upMd ? "600px" : "100%",
@@ -37,11 +90,11 @@ export default function Signup() {
                     gap: "15px",
                     borderRadius: "12px",
                     boxShadow: `0px 100px 309px rgba(210, 208, 225, 0.24),
-                                    0px 41.7776px 129.093px rgba(210, 208, 225, 0.172525), 
-                                    0px 22.3363px 69.0192px rgba(210, 208, 225, 0.143066),
-                                    0px 12.5216px 38.6916px rgba(210, 208, 225, 0.12),
-                                    0px 6.6501px 20.5488px rgba(210, 208, 225, 0.0969343),
-                                    0px 2.76726px 8.55082px rgba(210, 208, 225, 0.0674749)`,
+                                0px 41.7776px 129.093px rgba(210, 208, 225, 0.172525), 
+                                0px 22.3363px 69.0192px rgba(210, 208, 225, 0.143066),
+                                0px 12.5216px 38.6916px rgba(210, 208, 225, 0.12),
+                                0px 6.6501px 20.5488px rgba(210, 208, 225, 0.0969343),
+                                0px 2.76726px 8.55082px rgba(210, 208, 225, 0.0674749)`,
                 }}
             >
                 <IconButton
@@ -65,35 +118,70 @@ export default function Signup() {
                     }}
                 >Регистрация</Typography>
                 <InputTextfield
-                    value={email}
-                    onChange={e => setEmail(e.target.value)}
+                    TextfieldProps={{
+                        value: formik.values.login,
+                        placeholder: "username",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.login && Boolean(formik.errors.login),
+                        helperText: formik.touched.login && formik.errors.login,
+                    }}
+                    onChange={formik.handleChange}
+                    id="login"
+                    label="Login"
+                    gap={upMd ? "15px" : "10px"}
+                />
+                <InputTextfield
+                    TextfieldProps={{
+                        value: formik.values.email,
+                        placeholder: "username@penahub.com",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.email && Boolean(formik.errors.email),
+                        helperText: formik.touched.email && formik.errors.email,
+                    }}
+                    onChange={formik.handleChange}
                     id="email"
                     label="E-mail"
-                    placeholder="username@penahub.com"
                     gap={upMd ? "15px" : "10px"}
                 />
                 <InputTextfield
-                    value={phonenumber}
-                    onChange={e => setPhonenumber(e.target.value)}
-                    id="phonenumber"
+                    TextfieldProps={{
+                        value: formik.values.phoneNumber,
+                        placeholder: "+7 900 000 00 00",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.phoneNumber && Boolean(formik.errors.phoneNumber),
+                        helperText: formik.touched.phoneNumber && formik.errors.phoneNumber,
+                    }}
+                    onChange={formik.handleChange}
+                    id="phoneNumber"
                     label="Телефон"
-                    placeholder="+7 900 000 00 00"
                     gap={upMd ? "15px" : "10px"}
                 />
                 <InputTextfield
-                    value={password}
-                    onChange={e => setPassword(e.target.value)}
+                    TextfieldProps={{
+                        value: formik.values.password,
+                        placeholder: "Не менее 8 символов",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.password && Boolean(formik.errors.password),
+                        helperText: formik.touched.password && formik.errors.password,
+                        type: "password",
+                    }}
+                    onChange={formik.handleChange}
                     id="password"
                     label="Пароль"
-                    placeholder="Не менее 8 символов"
                     gap={upMd ? "15px" : "10px"}
                 />
                 <InputTextfield
-                    value={repeatPassword}
-                    onChange={e => setRepeatPassword(e.target.value)}
-                    id="repeat-password"
+                    TextfieldProps={{
+                        value: formik.values.repeatPassword,
+                        placeholder: "Не менее 8 символов",
+                        onBlur: formik.handleBlur,
+                        error: formik.touched.repeatPassword && Boolean(formik.errors.repeatPassword),
+                        helperText: formik.touched.repeatPassword && formik.errors.repeatPassword,
+                        type: "password",
+                    }}
+                    onChange={formik.handleChange}
+                    id="repeatPassword"
                     label="Повторить пароль"
-                    placeholder="Не менее 8 символов"
                     gap={upMd ? "15px" : "10px"}
                 />
                 <CustomButton
@@ -106,6 +194,8 @@ export default function Signup() {
                         mt: upMd ? undefined : "10px",
                     }}
                     py="12px"
+                    type="submit"
+                    disabled={formik.isSubmitting}
                 >Войти</CustomButton>
                 <Link
                     href="#"