Fix wrong key passed for creating FCM provider

src/routes/console/project-[project]/messaging/providers/create.svelte

@@ -180,7 +180,7 @@
                             providerId: providerId,
                             name: $providerParams[$provider].name,
                             enabled: $providerParams[$provider].enabled,
-                            serverKey: $providerParams[$provider].serverKey
+                            serviceAccountJSON: $providerParams[$provider].serviceAccountJSON
                         }
                     );
                     break;

src/routes/console/project-[project]/messaging/providers/provider-[provider]/updateStatus.svelte

@@ -101,7 +101,7 @@
                     providerId: $provider.$id,
                     name: $provider.name,
                     enabled: $provider.enabled,
-                    serverKey: $provider.credentials['serverKey']
+                    serviceAccountJSON: $provider.credentials['serviceAccountJSON']
                 };
                 break;
             case Providers.APNS:

src/routes/console/project-[project]/messaging/providers/store.ts

@@ -49,13 +49,13 @@ export const providers: ProvidersMap = {
                 description: 'Firebase Cloud Messaging',
                 configure: [
                     {
-                        label: 'Server key (.json file)',
-                        name: 'serverKey',
+                        label: 'Service account JSON (.json file)',
+                        name: 'serviceAccountJSON',
                         type: 'file',
                         allowedFileExtensions: ['json'],
-                        placeholder: 'Enter server key',
+                        placeholder: 'Enter service account JSON',
                         popover: [
-                            '<b>How to get the FCM server key?</b>',
+                            '<b>How to get the FCM service account JSON?</b>',
                             'Head to <b>Project settings -> Service accounts -> Generate new private key.</b>',
                             'Generating the new key will result in the download of a JSON file.'
                         ]

src/routes/console/project-[project]/messaging/providers/update.svelte

@@ -180,7 +180,7 @@
                             providerId: providerId,
                             name: $providerParams[$provider].name,
                             enabled: $providerParams[$provider].enabled,
-                            serverKey: $providerParams[$provider].serverKey
+                            serviceAccountJSON: $providerParams[$provider].serviceAccountJSON
                         }
                     );
                     break;

src/routes/console/project-[project]/messaging/providers/wizard/provider.svelte

@@ -90,7 +90,7 @@
                     providerId: id,
                     name: name,
                     enabled: true,
-                    serverKey: ''
+                    serviceAccountJSON: ''
                 };
                 break;
             case Providers.APNS:

src/routes/console/project-[project]/messaging/providers/wizard/store.ts

@@ -63,7 +63,7 @@ export type SendgridProviderParams = ProviderParams & {
  */
 
 export type FCMProviderParams = ProviderParams & {
-    serverKey: string;
+    serviceAccountJSON: string;
 };
 
 export type APNSProviderParams = ProviderParams & {