added logout functions

SimklUserFunctions.go

@@ -193,3 +193,17 @@ func (a *App) GetSimklLoggedInUser() SimklUser {
 
 	return user
 }
+
+func (a *App) LogoutSimkl() string {
+	if (SimklJWT{} != simklJwt) {
+		err := simklRing.Remove("SimklTokenType")
+		err = simklRing.Remove("SimklAccessToken")
+		err = simklRing.Remove("SimklScope")
+
+		if err != nil {
+			fmt.Println("Simkl Logout Failed", err)
+		}
+	}
+
+	return "Simkl Logged Out Successfully"
+}