Fix celebrate only accepting strings as password

server/schemas/joi.js

@@ -17,11 +17,15 @@ const userUpdateSchema = {
         body: {
             _id: Joi.string().required(),
             username: Joi.string().required(),
-        email: Joi.any(),
-        password: Joi.string().allow(''),
-        newPassword: Joi.string().allow(''),
+            __v: Joi.number().integer(),
+            email: Joi.string().email(),
+            registered: Joi.string(),
+            lastLogin: Joi.string(),
+            password: Joi.string().alphanum().allow(''),
+            newPassword: Joi.string().alphanum().allow(''),
         }
-};
+    }
+;
 
 const athleteUpdateSchema = {
     body: {