fix: make user signup work for the minimum

A lot of work is still to be done ...

internal/pkg/core/context.go

@@ -22,6 +22,18 @@
 
 package core
 
+import "time"
+
 type Context interface {
+	// Context
+	Deadline() (deadline time.Time, ok bool)
+	Done() <-chan struct{}
+	Err() error
+	Value(key any) any
+
+	// Request
+	Bind(obj any) error
+
+	// Response
 	JSON(code int, obj any)
 }