Restful API as Authentication for APP and some more

Hey, here are my requirements : -> #Authentication for Mobile Apps. ?signup=deviceid&email=mail[at]tld.eu&pass=123 Login valid with either deviceid or mail+pass ?login=deviceid&email=mail[at]tld.eu&pass=123 #Storage of user-Data Incoming Data via post should be associated to each user and stored in a database. -> Data consists of several Integers and strings that should be relayed from my Desktop-Software to the RESTful server, stored and available to be pulled via my App. #Access to Data All data should be readily available to be pulled via the API.