Consistently use "user" as the default subject type

middleware/ginz/check.go

@@ -131,7 +131,7 @@ func (o *CheckOptions) subjectType() string {
 		return o.subj.subjType
 	}
 
-	return "user"
+	return internal.DefaultSubjType
 }
 
 type Check struct {

middleware/gorillaz/check.go

@@ -131,7 +131,7 @@ func (o *CheckOptions) subjectType() string {
 		return o.subj.subjType
 	}
 
-	return "user"
+	return internal.DefaultSubjType
 }
 
 type Check struct {

middleware/grpcz/check.go

@@ -12,11 +12,6 @@ import (
 	"google.golang.org/grpc"
 )
 
-const (
-	DefaultSubjType = "user"
-	DefaultObjType  = "tenant"
-)
-
 type ObjectMapper func(ctx context.Context, req any) (objType, id string)
 type Filter func(ctx context.Context, req any) bool
 
@@ -63,7 +58,12 @@ func (o *CheckOptions) object(ctx context.Context, req any) (string, string) {
 }
 
 func (o *CheckOptions) subject(ctx context.Context, req any) (string, string) {
-	return o.subj.resolve(ctx, req)
+	subjType, subjID := o.subj.resolve(ctx, req)
+	if subjType == "" {
+		subjType = internal.DefaultSubjType
+	}
+
+	return subjType, subjID
 }
 
 func (o *CheckOptions) relation(ctx context.Context, req any) string {

middleware/grpcz/rebac.go

@@ -235,13 +235,9 @@ func (c *RebacMiddleware) subjectType() string {
 		return c.subjType
 	}
 
-	return DefaultSubjType
+	return internal.DefaultSubjType
 }
 
 func (c *RebacMiddleware) objectType() string {
-	if c.objType != "" {
-		return c.objType
-	}
-
-	return DefaultObjType
+	return c.objType
 }

middleware/httpz/check.go

@@ -121,7 +121,7 @@ func (o *CheckOptions) subjectType() string {
 		return o.subj.subjType
 	}
 
-	return "user"
+	return internal.DefaultSubjType
 }
 
 type Check struct {

middleware/internal/default.go

@@ -0,0 +1,5 @@
+package internal
+
+const (
+	DefaultSubjType = "user"
+)