feat/role based access (#50)

* feat: add roles based access

* feat: update roles env + todo

* feat: add roles to update profile

* feat: add role based oauth

* feat: validate role for a given token

server/utils/common.go

@@ -0,0 +1,20 @@
+package utils
+
+import (
+	"io"
+	"os"
+)
+
+func WriteToFile(filename string, data string) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, err = io.WriteString(file, data)
+	if err != nil {
+		return err
+	}
+	return file.Sync()
+}