added logout functions

AniListUserFunctions.go

@@ -200,3 +200,18 @@ func (a *App) GetAniListLoggedInUser() AniListUser {
 
 	return post
 }
+
+func (a *App) LogoutAniList() string {
+	if (AniListJWT{} != aniListJwt) {
+		err := aniRing.Remove("anilistTokenType")
+		err = aniRing.Remove("anilistTokenExpiresIn")
+		err = aniRing.Remove("anilistAccessToken")
+		err = aniRing.Remove("anilistRefreshToken")
+
+		if err != nil {
+			fmt.Println("AniList Logout Failed", err)
+		}
+	}
+
+	return "AniList Logged Out Successfully"
+}