add delete http method
add feature to delete issue
deal with users api
add feature to get user information by user_id
add feature to create user
add feature to delete user
add feature to get myself
add feature to get user icon
add feature to get user activities
add feature to get user starts
add feature to get user stars count
add feature to get space activities
add feature to get space image
implements put method
feature to get and to update space notification
deal with file upload
add feature to get space disk usage
add feature to upload file to space