diff --git a/src/http/api/users.ts b/src/http/api/users.ts
index d0ee128..11360ad 100644
--- a/src/http/api/users.ts
+++ b/src/http/api/users.ts
@@ -1,5 +1,6 @@
 import { v4 } from "https://deno.land/std@0.99.0/uuid/mod.ts";
 import { validate, required, maxLength, isEmail } from 'https://deno.land/x/validasaur@v0.15.0/mod.ts'
+import { uniqueUser } from '../../rules/uniqueUser.ts'
 
 import { Router } from 'https://deno.land/x/opine@1.5.3/mod.ts'
 
@@ -62,7 +63,7 @@ router.post('/', async function(request, response)
     let user
 
     const [ valid, errors ] = await validate(body, {
-        email: [ isEmail, required ],
+        email: [ isEmail, required, uniqueUser('email') ],
         password: [ maxLength(64) ],
         displayname: [ maxLength(128) ]
     })
@@ -97,7 +98,7 @@ router.put('/:id', async function(request, response, next)
     let user
 
     const [ valid, errors ] = await validate(body, {
-        email: [ isEmail, required ],
+        email: [ isEmail, required, uniqueUser('email') ],
         password: [ maxLength(64) ],
         displayname: [ maxLength(128) ]
     })
diff --git a/src/middleware/users.ts b/src/middleware/users.ts
index 01ac836..97bfb4f 100644
--- a/src/middleware/users.ts
+++ b/src/middleware/users.ts
@@ -7,12 +7,13 @@ import UserRepository from '../repositories/user.ts'
 const router = Router()
 
 /**
- *  check every route for single bucket
+ *  check route for user if parameter is
  *
  *  @param  request
  *  @param  response
  *  @param  next
  *  @return
+ *  
  */
 async function usersMiddleware(request: any, response: any, next: any)
 {
diff --git a/src/rules/unique.ts b/src/rules/uniqueUser.ts
similarity index 50%
rename from src/rules/unique.ts
rename to src/rules/uniqueUser.ts
index 05ce4ca..a2b3861 100644
--- a/src/rules/unique.ts
+++ b/src/rules/uniqueUser.ts
@@ -1,4 +1,6 @@
 import { invalid, Validity, Rule } from "https://deno.land/x/validasaur/mod.ts";
+import { Database } from 'https://deno.land/x/aloedb@0.9.0/mod.ts'
+import { UserSchema } from './../stores/user.ts'
 
 /**
  *  search for key
@@ -7,19 +9,22 @@ import { invalid, Validity, Rule } from "https://deno.land/x/validasaur/mod.ts";
  *  @param  value
  *  @return
  */
-export function unique(key: string, value: string): Rule {
+export function uniqueUser(key: string): Rule {
     return async function uniqueRule(value: any): Promise<Validity> {
 
+        console.log(value)
+
         if (typeof value !== 'string' && typeof value !== 'number') {
-            return invalid('unique', { value, table, column });
+            return invalid('unique', { key, value });
         }
 
+        const db = new Database<UserSchema>('./storage/database/users.json')
         const data = await db.findOne({
-            key: value
+            [ key ]: value
         })
 
         if (data !== null) {
-            return invalid('unique', { value, table, column });
+            return invalid('unique', { key, value });
         }
     }
 }
\ No newline at end of file