Add stash-box credentials validation (#2173)

graphql/documents/queries/settings/config.graphql

@@ -11,3 +11,10 @@ query Directory($path: String) {
       directories
   }
 }
+
+query ValidateStashBox($input: StashBoxInput!) {
+  validateStashBoxCredentials(input: $input) {
+    valid
+    status
+  }
+}

graphql/schema/schema.graphql

@@ -136,6 +136,7 @@ type Query {
     "Desired collation locale. Determines the order of the directory result. eg. 'en-US', 'pt-BR', ..."
     locale: String = "en"
   ): Directory!
+  validateStashBoxCredentials(input: StashBoxInput!): StashBoxValidationResult!
 
   # System status
   systemStatus: SystemStatus!

graphql/schema/types/config.graphql

@@ -391,3 +391,8 @@ type StashConfig {
 input GenerateAPIKeyInput {
   clear: Boolean
 }
+
+type StashBoxValidationResult {
+  valid: Boolean!
+  status: String!
+}

graphql/stash-box/query.graphql

@@ -156,3 +156,9 @@ query FindSceneByID($id: ID!) {
 mutation SubmitFingerprint($input: FingerprintSubmission!) {
   submitFingerprint(input: $input)
 }
+
+query Me {
+  me {
+    name
+  }
+}