diff --git a/src/Header/Header.tsx b/src/Header/Header.tsx
index ccd0457e3..147e9c923 100644
--- a/src/Header/Header.tsx
+++ b/src/Header/Header.tsx
@@ -34,10 +34,6 @@ const StyledIconButton = styled(IconButton)(
   }),
 );
 
-const StyledToolbar = styled(Toolbar)({
-  // justifyContent: 'space-between',
-});
-
 type HeaderMenuIconProps = {
   isOpen: boolean;
   buttonId?: string;
@@ -121,7 +117,7 @@ export const Header = ({
           ...sx,
         }}
       >
-        <StyledToolbar disableGutters>
+        <Toolbar disableGutters>
           {hasSidebar && (
             <HeaderMenuIcon
               isOpen={isSidebarOpen}
@@ -142,7 +138,7 @@ export const Header = ({
             {centerContent}
             {rightContent}
           </Stack>
-        </StyledToolbar>
+        </Toolbar>
       </AppBar>
       <Toolbar />
     </>
diff --git a/src/itemLogin/ItemLoginScreen.tsx b/src/itemLogin/ItemLoginScreen.tsx
index ceb57be23..dc1953f52 100644
--- a/src/itemLogin/ItemLoginScreen.tsx
+++ b/src/itemLogin/ItemLoginScreen.tsx
@@ -13,7 +13,6 @@ import { ItemLoginSchemaType, UUID } from '@graasp/sdk';
 
 import Button from '../buttons/Button/Button.js';
 import ForbiddenText from './ForbiddenText.js';
-import { isMemberIdValid } from './utils.js';
 
 export type SignInPropertiesType = {
   memberId?: string;
@@ -115,16 +114,12 @@ const ItemLoginScreen = ({
   };
 
   const shouldSignInBeDisabled = (): boolean => {
-    const usernameError = !username?.length || isMemberIdValid(username);
+    const usernameError = !username?.length;
     const passwordError = withPassword && !password?.length;
     return usernameError || passwordError;
   };
 
-  const isMemberId = isMemberIdValid(username);
-  const error = Boolean(username?.length && isMemberId);
-  const helperText = isMemberId
-    ? t('This is a member id. You should switch the sign in mode.')
-    : null;
+  const error = Boolean(username?.length);
 
   return (
     <WrapperContainer maxWidth='xs'>
@@ -138,7 +133,6 @@ const ItemLoginScreen = ({
           variant='outlined'
           fullWidth
           type='text'
-          helperText={helperText}
           id={usernameInputId}
           value={username}
           onKeyDown={handleUsernamePressEnter}
diff --git a/src/itemLogin/utils.test.ts b/src/itemLogin/utils.test.ts
deleted file mode 100644
index 967d71b28..000000000
--- a/src/itemLogin/utils.test.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import { v4 } from 'uuid';
-import { describe, expect, it } from 'vitest';
-
-import { isMemberIdValid } from './utils.js';
-
-describe('Validate MemberId', () => {
-  it('Valid ID', () => {
-    const id = v4();
-    expect(isMemberIdValid(id)).toBeTruthy();
-  });
-
-  it('Valid ID with whitespace', () => {
-    const id = `  ${v4()}   `;
-    expect(isMemberIdValid(id)).toBeTruthy();
-  });
-
-  it('Invalid ID', () => {
-    const id = `  bobo  `;
-    expect(isMemberIdValid(id)).toBeFalsy();
-  });
-});
diff --git a/src/itemLogin/utils.ts b/src/itemLogin/utils.ts
deleted file mode 100644
index 62fafe69d..000000000
--- a/src/itemLogin/utils.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { validate } from 'uuid';
-
-export const isMemberIdValid = (memberId?: string): boolean => {
-  if (!memberId) {
-    return false;
-  }
-  return validate(memberId?.trim());
-};