I want to login with email and phone number oauth

Question

I want to login with email or phone number in oauth

 

email is default here ,but i want to compare email and phone number from Database

public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
{
    var identity = new ClaimsIdentity(context.Options.AuthenticationType);
    string Email = context.OwinContext.Get<string>("Email");
    if (Email == "[email protected]" && context.Password == "admin")
    {
        identity.AddClaim(new Claim(ClaimTypes.Role, "admin"));
        identity.AddClaim(new Claim("username", "admin"));
        identity.AddClaim(new Claim(ClaimTypes.Name, "Hi Admin"));
        context.Validated(identity);
    }
    else if (context.UserName == "user" && context.Password == "user")
    {
        identity.AddClaim(new Claim(ClaimTypes.Role, "user"));
        identity.AddClaim(new Claim("username", "user"));
        identity.AddClaim(new Claim(ClaimTypes.Name, "Hi User"));
        context.Validated(identity);
    }
    else
    {
        context.SetError("invalid_grant", "Provided username and password is incorrect");
        return;
    }
}

public override Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
{
    //Here we get the Custom Field sent in /Token
    var Email = context.Parameters.Where(x => x.Key == "Email").Select(x => x.Value).FirstOrDefault();
    if (Email.Length > 0 && Email[0].Trim().Length > 0)
    {
        context.OwinContext.Set<string>("Email", Email[0].Trim());
    }
    // Resource owner password credentials does not provide a client ID.
    if (context.ClientId == null)
    {
        context.Validated();
    }
    return Task.FromResult<object>(null);
}