/// <summary>
/// Check credentials.
/// </summary>
/// <param name="phone"></param>
/// <param name="password"></param>
/// <returns>
/// 'n' if normal <br/>
/// 'a' if account was not found <br/>
/// 'p' if wrong password <br/>
/// 'b' if account is banned <br/>
/// 'd' if account is deactivated.
/// </returns>
public static char CheckCredentials(string phone, string password)
{
Credential cr = new Credential();
bool accountPresent = CredentialCache.TryGet(phone, out cr);
if (!accountPresent)
{
return('a');
}
if (cr.Status == (byte)'b')
{
return('b');
}
if (cr.Password == password)
{
if (cr.Status == (byte)'d')
{
return('d');
}
return('n');
}
return('p');
}