public TokenController(
     IOptions<OAuthBearerAuthenticationOptions> bearerOptions,
     SigningCredentials signingCredentials)
 {
     _bearerOptions = bearerOptions.Options;
     _signingCredentials = signingCredentials;
 }
 public TokenController(IOptions<OAuthBearerAuthenticationOptions> options, SigningCredentials signingCredentials)
 {
     this.bearerOptions = options.Options;
     this.signingCredentials = signingCredentials;
 }