adjust social media types to fit new definition

backend/src/schema/types/schema.gql

@@ -134,5 +134,5 @@ type SharedInboxEndpoint {
 type SocialMedia {
   id: ID!
   url: String
-  ownedBy: [User]! @relation(name: "OWNED", direction: "IN")
+  ownedBy: [User]! @relation(name: "OWNED_BY", direction: "IN")
 }

backend/src/schema/types/type/User.gql

@@ -17,7 +17,6 @@ type User {
   location: Location @cypher(statement: "MATCH (this)-[:IS_IN]->(l:Location) RETURN l")
   locationName: String
   about: String
-  socialMedia: [SocialMedia]! @relation(name: "OWNED", direction: "OUT")
 
   #createdAt: DateTime
   #updatedAt: DateTime