Changes to Generate tokens

added the non-success response with the status 429

the endpoint scheme security basicAuth was added to the API

the endpoint scheme security oAuth was removed from the API

media type application/hal+json was changed to a more general media type application/json for the response status 200

request property grant_type was restricted to a list of enum values

the request property code became not nullable

the request property redirect_uri became not nullable

the request property refresh_token became not nullable

removed the media type text/html for the response with the status 200

added the new authorization_code enum value to the request property grant_type

added the new refresh_token enum value to the request property grant_type

added the media type application/hal+json for the response with the status 200