Improve API, to avoid ignoring errors

libraries/pushstore/api/src/main/kotlin/io/element/android/libraries/pushstore/api/UserPushStore.kt

@@ -24,7 +24,7 @@ interface UserPushStore {
     suspend fun getPushProviderName(): String?
     suspend fun setPushProviderName(value: String)
     suspend fun getCurrentRegisteredPushKey(): String?
-    suspend fun setCurrentRegisteredPushKey(value: String)
+    suspend fun setCurrentRegisteredPushKey(value: String?)
 
     fun getNotificationEnabledForDevice(): Flow<Boolean>
     suspend fun setNotificationEnabledForDevice(enabled: Boolean)

libraries/pushstore/impl/src/main/kotlin/io/element/android/libraries/pushstore/impl/UserPushStoreDataStore.kt

@@ -76,9 +76,13 @@ class UserPushStoreDataStore(
         return context.dataStore.data.first()[currentPushKey]
     }
 
-    override suspend fun setCurrentRegisteredPushKey(value: String) {
+    override suspend fun setCurrentRegisteredPushKey(value: String?) {
         context.dataStore.edit {
-            it[currentPushKey] = value
+            if (value == null) {
+                it.remove(currentPushKey)
+            } else {
+                it[currentPushKey] = value
+            }
         }
     }
 

libraries/pushstore/test/src/main/kotlin/com/element/android/libraries/pushstore/test/userpushstore/FakeUserPushStore.kt

@@ -36,7 +36,7 @@ class FakeUserPushStore : UserPushStore {
         return currentRegisteredPushKey
     }
 
-    override suspend fun setCurrentRegisteredPushKey(value: String) {
+    override suspend fun setCurrentRegisteredPushKey(value: String?) {
         currentRegisteredPushKey = value
     }