Authorization of network node

An apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to perform:

• receive, by a network repository function, a registration request from an application function, wherein the registration request comprises at least one parameter that needs to be used for generating an access token for the application function, the at least one parameter being associated with the application function;
• register the application function by the network repository function;
• and
• transmit, by the network repository function, a response to the registration request, wherein the response comprises the at least one parameter associated with the application function.