[solved]Stuck on a The input is not a valid Base-64 string error

 [HttpPost("login")]
 public async Task<IActionResult> Login(LoginDto loginDto)
 {
     if (!ModelState.IsValid)
         return BadRequest(ModelState);
     
     var user = await _userManager.Users.FirstOrDefaultAsync(x => x.Email == loginDto.Email);

     if (user == null)
         return Unauthorized("Invalid Email");

   
var result = await _signInManager.CheckPasswordSignInAsync(user, loginDto.Password,false);
    
 
     if (!result.Succeeded)
         return Unauthorized("Email or Password not found/incorrect");

     return Ok(
         new NewUserDto
         {
         
             Email = user.Email,
             Token = _tokenService.CreateToken(user)
         });
 }