login with mobile number in core API

Question

 Here i login with username .But i want to login with phone number.

public async Task<IActionResult> Login([FromBody] LoginModel model)

{

var user = await userManager.FindByNameAsync(model.Username);

if (user != null && await userManager.CheckPasswordAsync(user, model.Password))

{

var userRoles = await userManager.GetRolesAsync(user);

var authClaims = new List<Claim>

{

new Claim(ClaimTypes.Name, user.UserName),

new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),

};

foreach (var userRole in userRoles)

{

authClaims.Add(new Claim(ClaimTypes.Role, userRole));

}

var authSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["JWT:Secret"]));

var token = new JwtSecurityToken(

issuer: _configuration["JWT:ValidIssuer"],

audience: _configuration["JWT:ValidAudience"],

expires: DateTime.Now.AddHours(3),

claims: authClaims,

signingCredentials: new SigningCredentials(authSigningKey, SecurityAlgorithms.HmacSha256)

);

return Ok(new

{

token = new JwtSecurityTokenHandler().WriteToken(token),

username=user.UserName,

expiration = token.ValidTo

});

}

return Unauthorized();

}