MM-9779: Incorporate a Token into the invitations system (#8604)

* Incorporate a Token into the invitations system

* Adding unit tests

* Fixing some api4 client tests

* Removing unnecesary hash validation

* Change the Hash concept on invitations with tokenId

* Not send invitation if it wasn't able to create the Token

* Fixing some naming problems

* Changing the hash query params received from the client side

* Removed unneded data param in the token usage

api4/team.go

@@ -376,15 +376,14 @@ func addTeamMember(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func addUserToTeamFromInvite(c *Context, w http.ResponseWriter, r *http.Request) {
-	hash := r.URL.Query().Get("hash")
-	data := r.URL.Query().Get("data")
+	tokenId := r.URL.Query().Get("token")
 	inviteId := r.URL.Query().Get("invite_id")
 
 	var member *model.TeamMember
 	var err *model.AppError
 
-	if len(hash) > 0 && len(data) > 0 {
-		member, err = c.App.AddTeamMemberByHash(c.Session.UserId, hash, data)
+	if len(tokenId) > 0 {
+		member, err = c.App.AddTeamMemberByToken(c.Session.UserId, tokenId)
 	} else if len(inviteId) > 0 {
 		member, err = c.App.AddTeamMemberByInviteId(inviteId, c.Session.UserId)
 	} else {