Use own type as context key

http/graph/resolver/process.resolvers.go

@@ -11,7 +11,7 @@ import (
 
 // Processes is the resolver for the processes field.
 func (r *queryResolver) Processes(ctx context.Context, idpattern *string, refpattern *string, group *string) ([]*models.Process, error) {
-	user, _ := ctx.Value("user").(string)
+	user, _ := ctx.Value(GraphKey("user")).(string)
 	ids := r.Restream.GetProcessIDs(*idpattern, *refpattern, user, *group)
 
 	procs := []*models.Process{}
@@ -30,14 +30,14 @@ func (r *queryResolver) Processes(ctx context.Context, idpattern *string, refpat
 
 // Process is the resolver for the process field.
 func (r *queryResolver) Process(ctx context.Context, id string, group *string) (*models.Process, error) {
-	user, _ := ctx.Value("user").(string)
+	user, _ := ctx.Value(GraphKey("user")).(string)
 
 	return r.getProcess(id, user, *group)
 }
 
 // Probe is the resolver for the probe field.
 func (r *queryResolver) Probe(ctx context.Context, id string, group *string) (*models.Probe, error) {
-	user, _ := ctx.Value("user").(string)
+	user, _ := ctx.Value(GraphKey("user")).(string)
 
 	probe := r.Restream.Probe(id, user, *group)
 

http/graph/resolver/resolver.go

@@ -86,3 +86,5 @@ func (r *queryResolver) playoutRequest(method, addr, path, contentType string, d
 
 	return data, nil
 }
+
+type GraphKey string

http/handler/api/graph.go

@@ -47,7 +47,7 @@ func (g *GraphHandler) Query(c echo.Context) error {
 	user, _ := c.Get("user").(string)
 
 	r := c.Request()
-	ctx := context.WithValue(r.Context(), "user", user)
+	ctx := context.WithValue(r.Context(), resolver.GraphKey("user"), user)
 
 	g.queryHandler.ServeHTTP(c.Response(), r.WithContext(ctx))