The invention relates to a method for a data consumer network function, NF, of a communication network to collect data from a data producer NF, the method comprising: o sending (810), to a network repository function, NRF, in the communication network, a request for an access token for a service provided by a data collection coordination function, DCCF, in the communication network; o receiving (820), from the NRF, at least one access token for the service provided by the DCCF; and o using (830) the at least one access token, collecting data from the data producer NF in the communication network via the DCCF service.