code: func TokenURL(tokenURL string) {
  	if parent, ok := dslengine.CurrentDefinition().(*design.SecuritySchemeDefinition); ok {
  		if parent.Kind == design.JWTSecurityKind {
  			parent.TokenURL = tokenURL
  			return
  		}
  	}
  	dslengine.IncompatibleDSL()
  }
docs: // TokenURL can be used in: JWTSecurity
  //
  // TokenURL defines a URL to get an access token.  If you are defining OAuth2 flows, use
  // `ImplicitFlow`, `PasswordFlow`, `AccessCodeFlow` or `ApplicationFlow` instead. This will set an
  // endpoint where you can obtain a JWT with the JWTSecurity scheme. The URL may be a complete URL
  // or just a path in which case the API scheme and host are used to build the full URL.