4 Review all these *Client receiver methods. They should probably either

     1 Review all these *Client receiver methods. They should probably either

     5 all be receivers, or none.

     2 all be receivers, or none.

     6 

     3 

     7 Maybe put auth-related stuff into its own structure inside Client,

     4 Maybe put auth-related stuff into its own structure inside Client,

     8 instead of at Client's top level.

     5 instead of at Client's top level.