diff --git a/api.go b/api.go
index d11971b6..b8169111 100644
--- a/api.go
+++ b/api.go
@@ -21,6 +21,8 @@ import (
 const (
 	reservedResponseHeaderSize = 4
 	RegisterMethodAuthKey      = "authKey"
+	RegisterMethodOIDC         = "oidc"
+	RegisterMethodCLI          = "cli"
 )
 
 // KeyHandler provides the Headscale pub key
@@ -422,8 +424,6 @@ func (h *Headscale) handleMachineRefreshKey(
 		return
 	}
 	ctx.Data(http.StatusOK, "application/json; charset=utf-8", respBody)
-
-	return
 }
 
 func (h *Headscale) handleMachineRegistrationNew(
diff --git a/machine.go b/machine.go
index dcd79700..293b26fa 100644
--- a/machine.go
+++ b/machine.go
@@ -660,7 +660,7 @@ func (h *Headscale) RegisterMachine(
 	machine.IPAddress = ip.String()
 	machine.NamespaceID = namespace.ID
 	machine.Registered = true
-	machine.RegisterMethod = "cli"
+	machine.RegisterMethod = RegisterMethodCLI
 	h.db.Save(&machine)
 
 	log.Trace().
diff --git a/oidc.go b/oidc.go
index 07561e8a..f796c908 100644
--- a/oidc.go
+++ b/oidc.go
@@ -223,7 +223,7 @@ func (h *Headscale) OIDCCallback(ctx *gin.Context) {
 			machine.IPAddress = ip.String()
 			machine.NamespaceID = namespace.ID
 			machine.Registered = true
-			machine.RegisterMethod = "oidc"
+			machine.RegisterMethod = RegisterMethodOIDC
 			machine.LastSuccessfulUpdate = &now
 			h.db.Save(&machine)
 		}