what are the IDENTITY counterparts to these outdated SQL-membership functions

The following are all SQL-Membership functions that I have been using in my website.   I now want to port to IDENTITY, but I don't know what to replace them with:

Roles.GetRolesForUser(username) returns list
Roles.AddUserToRole(username,role)
Roles.removeUserFromRole(username,role)
Roles.IsUserInRole("zowner")
membership.getuser()
Membership.getallusers()
Membership.deleteuser(username)
email - Membership.getusernamebyemail(username)
Membership.getcreateusererrormessage
Membership.generatepassword
Membership.createuser()
Membership.validateuser(username,password
Membership.getuser().username
Membership.updateuser(newusers)
getuser(username).isapproved
Membership.enablepassword
FormsAuthentication.signout()
FormsAuthentication.timeout.totalminutes
FormsAuthentication.requireSSL
FormsAuthentication.RedirectToLoginPage

My question is, are there IDENTITY counterparts to these, and if so, how do I look them up?