Changes to GET /v2/retention-campaigns

added the new credentials_missing enum value to the anyOf[subschema #2]/code response property for the response status 400

added the new credentials_missing enum value to the code/anyOf[subschema #1] response property for the response status 403

added the new credentials_missing enum value to the code/anyOf[subschema #1] response property for the response status 404

added the new credentials_missing enum value to the code/anyOf[subschema #1] response property for the response status 429

added the new credentials_missing enum value to the code/anyOf[subschema #1] response property for the response status 502

added subschema #1 subschema #2 to the response body anyOf list for the response status 500

added subschema #1 subschema #2 subschema #3 subschema #4 subschema #5 to the response body anyOf list for the response status 401

removed subschema #1 subschema #2 from the response body anyOf list for the response status 500

removed subschema #1 subschema #2 subschema #3 subschema #4 subschema #5 from the response body anyOf list for the response status 401

endpoint added