Changes to Get User Credential

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

response property credentials/items/additionalProperties/ list-of-types was widened by adding types null to media type application/json of response 200

header request parameter x-osmo-user list-of-types was widened by adding types null

for the header request parameter x-osmo-user, the type was generalized from string to no type

the response's body type changed from string to object for status 200

added the required property credentials to the response with the 200 status