Generate a client token

[brunolm]

What

Generate a token for the client to send in subsequent requests

Why

We need to generate a token for the client requesting information so it can re-stabilish a connection and continue from where it left of

For the next 7 days, the state remains unchanged and the client can reconnect (presenting the correct client_token and continue where he left off. After 7 days, the state is deleted and the wallet funds are transferred to a master wallet that is part of the RP’s general income pool.