Merge branch '56-registration-fix' into 'main'

#56 - Fix registration

Closes #56

See merge request !59

src/sparql/sparql.ts

@@ -108,7 +108,7 @@ export async function executeSparqlInsert(
       },
       body: insertQuery,
       auth: options?.auth ?? {
-        username: import.meta.env.VITE_VISITOR_USER,
+        email: import.meta.env.VITE_VISITOR_USER,
         password: import.meta.env.VITE_VISITOR_PWD,
       }
     }