diff --git a/backend/src/data/users.ts b/backend/src/data/users.ts
index 5a64adc6..3891e7c4 100644
--- a/backend/src/data/users.ts
+++ b/backend/src/data/users.ts
@@ -1,6 +1,5 @@
 const userData = [
   {
-    "nick": "boejiden",
     "password": "sleepyjoe",
     "first_name": "Joe",
     "last_name": "Biden",
@@ -12,7 +11,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "adamos",
     "password": "mysz888",
     "first_name": "Adam",
     "last_name": "Małysz",
@@ -24,7 +22,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "budyn1989",
     "password": "kaczorlove",
     "first_name": "Andrew",
     "last_name": "Duda",
@@ -36,7 +33,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "mentosdestroyer4",
     "password": "mmmcow",
     "first_name": "Kuba",
     "last_name": "Nowak",
@@ -48,7 +44,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "elonmusk",
     "password": "DogeToTheMOON",
     "first_name": "Elon",
     "last_name": "Musk",
@@ -60,7 +55,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "nowayno3",
     "password": "432525n",
     "first_name": "Olivia",
     "last_name": "Smith",
@@ -71,7 +65,6 @@ const userData = [
     "chats": [],
   },
   {
-    "nick": "rEptiliAn69",
     "password": "metaverse4ever",
     "first_name": "Mark",
     "last_name": "Zuckerberg",
diff --git a/backend/src/models/User.ts b/backend/src/models/User.ts
index 7e6f957b..b8226ab0 100644
--- a/backend/src/models/User.ts
+++ b/backend/src/models/User.ts
@@ -1,7 +1,6 @@
 import Chat from "./Chat";
 
 export default interface User {
-  nick: string;
   password: string;
   first_name: string;
   last_name: string;
diff --git a/backend/test/userEndpoints.test.ts b/backend/test/userEndpoints.test.ts
index 4d5a45db..d26c79a1 100644
--- a/backend/test/userEndpoints.test.ts
+++ b/backend/test/userEndpoints.test.ts
@@ -4,7 +4,6 @@ let userId: number;
 
 test("Create user", async () => {
   const userData = {
-    nick: "Tommy",
     password: "12345",
     first_name: "Tom",
     last_name: "Hanks",
@@ -40,7 +39,6 @@ test("Fetch user by ID", async () => {
 
 test("Update user by ID", async () => {
   const userUpdateData = {
-    nick: "Tommy",
     password: "54321",
     first_name: "Tommy",
     last_name: "Hanks",
@@ -82,7 +80,7 @@ test("Get user's friends", async () => {
   expect(usersStatus).toBe("ok");
 
   const zuck = usersResponseData.users.find(
-    (user: any) => user.nick == "rEptiliAn69",
+    (user: any) => user.mail == "goodboymark1@meta.com",
   );
   const zuckId = zuck.id;
 
@@ -119,7 +117,7 @@ test("Search users", async () => {
   expect(usersStatus).toBe("ok");
 
   const zuck = usersResponseData.users.find(
-    ([user, _score]: any) => user.nick == "rEptiliAn69",
+    ([user, _score]: any) => user.mail == "goodboymark1@meta.com",
   );
 
   expect(zuck).toBeDefined();
diff --git a/frontend/src/components/LoginBox.tsx b/frontend/src/components/LoginBox.tsx
index b0b09604..90e5de86 100644
--- a/frontend/src/components/LoginBox.tsx
+++ b/frontend/src/components/LoginBox.tsx
@@ -36,11 +36,11 @@ function LoginBox() {
       className=" medium:w-[25vw] flex flex-col gap-2 bg-my-dark p-10 px-20 rounded-xl"
       id="login-box"
     >
-      <div>Login:</div>
+      <div>E-mail:</div>
       <input
         type="text"
         className="text-my-dark form-input"
-        placeholder="Login"
+        placeholder="E-mail"
         onChange={(e) => setLogin(e.target.value)}
       />
 
diff --git a/frontend/src/components/RegisterBox.tsx b/frontend/src/components/RegisterBox.tsx
index f80eb8d6..c542addd 100644
--- a/frontend/src/components/RegisterBox.tsx
+++ b/frontend/src/components/RegisterBox.tsx
@@ -75,14 +75,6 @@ function RegisterBox() {
           placeholder="E-mail"
         />
 
-        <div>Login:</div>
-        <input
-          type="text"
-          className="text-my-dark form-input"
-          onChange={updateFormUser("nick")}
-          placeholder="Login"
-        />
-
         <div>Password:</div>
         <input
           type="password"
diff --git a/frontend/src/models/user.model.ts b/frontend/src/models/user.model.ts
index 12f0e7ce..8ef4ab09 100644
--- a/frontend/src/models/user.model.ts
+++ b/frontend/src/models/user.model.ts
@@ -1,6 +1,5 @@
 interface User {
   id: number;
-  nick: string;
   password: string;
   first_name: string;
   last_name: string;