Apparatuses, methods, and systems are disclosed for user authentication using a connection information package provided by a blockchain network. One apparatus includes a processor and a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the apparatus to receive, from a smart contract, a set of connection information packages and to receive, from a first function, a request to authenticate a roaming user. The instructions are further executable by the processor to cause the apparatus to determine whether the first function is associated with a valid connection information package and to accept the request to authenticate the roaming user in response to the first function being associated with the valid connection information package.