@borjasalguero, @sergi, @OlavHN - I am wondering if a good way to handle errors is to pass back a response from FxModuleServerRequest that contains the data to use for the title/message of the error screen so that we do not have to use a switch statement in every handler? @ferjm lists out the set of errors here: https://id.etherpad.mozilla.org/fxa-on-fxos-architecture