JUMP TOBigMailer APIBrandsList brandsgetCreate brandpostGet brandgetUpdate brandpostConnectionsList connectionsgetGet connectiongetContactsList contactsgetCreate contactpostCreate or update contactpostGet contactgetUpdate contactpostDelete contactdeleteListsList listsgetCreate listpostGet listgetUpdate listpostDelete listdeleteFieldsList fieldsgetMessage TypesList message typesgetTransactional CampaignsSend a transactional emailpostUsersList usersgetCreate userpostGet usergetUpdate userpostDelete userdeletePowered by Update userpost https://api.bigmailer.io/v1/users/{user_id}Update a user.