add fitbit user repository

Author: jzhou59

src/main/kotlin/org/radarbase/push/integration/fitbit/user/FitbitUserRepository.kt

@@ -0,0 +1,30 @@
+package org.radarbase.push.integration.fitbit.user
+
+import org.radarbase.push.integration.common.user.User
+import org.radarbase.push.integration.common.user.UserRepository
+
+class FitbitUserRepository : UserRepository {
+    override fun get(key: String): User? {
+        TODO("Not yet implemented")
+    }
+
+    override fun stream(): Sequence<User> {
+        TODO("Not yet implemented")
+    }
+
+    override fun getAccessToken(user: User): String {
+        TODO("Not yet implemented")
+    }
+
+    override fun getRefreshToken(user: User): String {
+        TODO("Not yet implemented")
+    }
+
+    override fun hasPendingUpdates(): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun applyPendingUpdates() {
+        TODO("Not yet implemented")
+    }
+}