diff --git a/litecord/auth.py b/litecord/auth.py
index b52e1a1..3c52ddf 100644
--- a/litecord/auth.py
+++ b/litecord/auth.py
@@ -20,7 +20,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 import base64
 import binascii
 from random import randint
-from typing import Tuple
+from typing import Tuple, Optional
 
 import bcrypt
 from asyncpg import UniqueViolationError
@@ -145,7 +145,6 @@ async def hash_data(data: str, loop=None) -> str:
     return hashed.decode()
 
 
-
 async def check_username_usage(username: str, db=None):
     """Raise an error if too many people are with the same username."""
     db = db or app.db
@@ -155,13 +154,52 @@ async def check_username_usage(username: str, db=None):
     WHERE username = $1
     """, username)
 
-    if same_username > 8000:
+    if same_username > 9000:
         raise BadRequest('Too many people.', {
             'username': 'Too many people used the same username. '
                         'Please choose another'
         })
 
 
+def _raw_discrim() -> str:
+    new_discrim = randint(1, 9999)
+    new_discrim = '%04d' % new_discrim
+    return new_discrim
+
+
+async def roll_discrim(username: str, *, db=None) -> Optional[str]:
+    """Roll a discriminator for a DiscordTag.
+
+    Tries to generate one 10 times.
+
+    Calls check_username_usage.
+    """
+    db = db or app.db
+
+    # we shouldn't roll discrims for usernames
+    # that have been used too much.
+    await check_username_usage(username, db)
+
+    # max 10 times for a reroll
+    for _ in range(10):
+        # generate random discrim
+        discrim = _raw_discrim()
+
+        # check if anyone is with it
+        res = await db.fetchval("""
+        SELECT id
+        FROM users
+        WHERE username = $1 AND discriminator = $2
+        """, username, discrim)
+
+        # if no user is found with the (username, discrim)
+        # pair, then this is unique! return it.
+        if res is None:
+            return discrim
+
+    return None
+
+
 async def create_user(username: str, email: str, password: str,
                       db=None, loop=None) -> Tuple[int, str]:
     """Create a single user.
@@ -173,16 +211,15 @@ async def create_user(username: str, email: str, password: str,
     loop = loop or app.loop
 
     new_id = get_snowflake()
+    new_discrim = await roll_discrim(username, db=db)
 
-    # TODO: unified discrim generation based off username, that also includes
-    # the check_username_usage()
-    new_discrim = randint(1, 9999)
-    new_discrim = '%04d' % new_discrim
+    if new_discrim is None:
+        raise BadRequest('Unable to register.', {
+            'username': 'Too many people are with this username.'
+        })
 
     pwd_hash = await hash_data(password, loop)
 
-    await check_username_usage(username, db)
-
     try:
         await db.execute("""
         INSERT INTO users
diff --git a/litecord/blueprints/users.py b/litecord/blueprints/users.py
index 3789eda..a3d7672 100644
--- a/litecord/blueprints/users.py
+++ b/litecord/blueprints/users.py
@@ -17,7 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
-import random
 from os import urandom
 
 from asyncpg import UniqueViolationError
@@ -28,7 +27,9 @@ from ..errors import Forbidden, BadRequest, Unauthorized
 from ..schemas import validate, USER_UPDATE, GET_MENTIONS
 
 from .guilds import guild_check
-from litecord.auth import token_check, hash_data, check_username_usage
+from litecord.auth import (
+    token_check, hash_data, check_username_usage, roll_discrim
+)
 from litecord.blueprints.guild.mod import remove_member
 
 from litecord.enums import PremiumType
@@ -110,36 +111,6 @@ async def get_other(target_id):
     return jsonify(other)
 
 
-async def _try_reroll(user_id, preferred_username: str = None):
-    for _ in range(10):
-        reroll = str(random.randint(1, 9999))
-
-        if preferred_username:
-            existing_uid = await app.db.fetchrow("""
-            SELECT user_id
-            FROM users
-            WHERE username = $1 AND discriminator = $2
-            """, preferred_username, reroll)
-
-            if not existing_uid:
-                return reroll
-
-            continue
-
-        try:
-            await app.db.execute("""
-            UPDATE users
-            SET discriminator = $1
-            WHERE users.id = $2
-            """, reroll, user_id)
-
-            return reroll
-        except UniqueViolationError:
-            continue
-
-    return
-
-
 async def _try_username_patch(user_id, new_username: str) -> str:
     await check_username_usage(new_username)
     discrim = None
@@ -157,7 +128,7 @@ async def _try_username_patch(user_id, new_username: str) -> str:
         WHERE users.id = $1
         """, user_id)
     except UniqueViolationError:
-        discrim = await _try_reroll(user_id, new_username)
+        discrim = await roll_discrim(new_username)
 
         if not discrim:
             raise BadRequest('Unable to change username', {
diff --git a/tests/conftest.py b/tests/conftest.py
index bb8b171..48c5726 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -43,6 +43,10 @@ def _test_app(unused_tcp_port, event_loop):
     main_app.config['WS_PORT'] = ws_port
     main_app.config['WEBSOCKET_URL'] = f'localhost:{ws_port}'
 
+    # testing user creations requires hardcoding this to true
+    # on testing
+    main_app.config['REGISTRATIONS'] = True
+
     # make sure we're calling the before_serving hooks
     event_loop.run_until_complete(main_app.startup())
 
diff --git a/tests/test_user.py b/tests/test_user.py
index 3e00c40..7a851a0 100644
--- a/tests/test_user.py
+++ b/tests/test_user.py
@@ -18,6 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 import pytest
+import secrets
 
 from tests.common import login, get_uid
 
@@ -33,6 +34,14 @@ async def test_get_me(test_cli):
     rjson = await resp.json
     assert isinstance(rjson, dict)
 
+    # incomplete user assertions, but should be enough
+    assert isinstance(rjson['id'], str)
+    assert isinstance(rjson['username'], str)
+    assert isinstance(rjson['discriminator'], str)
+    assert rjson['avatar'] is None or isinstance(rjson['avatar'], str)
+    assert isinstance(rjson['flags'], int)
+    assert isinstance(rjson['bot'], bool)
+
 
 @pytest.mark.asyncio
 async def test_get_me_guilds(test_cli):
@@ -63,3 +72,46 @@ async def test_get_profile_self(test_cli):
     assert (rjson['premium_since'] is None
             or isinstance(rjson['premium_since'], str))
     assert isinstance(rjson['mutual_guilds'], list)
+
+
+@pytest.mark.asyncio
+async def test_create_user(test_cli):
+    """Test the creation and deletion of a user."""
+    username = secrets.token_hex(4)
+    _email = secrets.token_hex(5)
+    email = f'{_email}@{_email}.com'
+    password = secrets.token_hex(6)
+
+    resp = await test_cli.post('/api/v6/auth/register', json={
+        'username': username,
+        'email': email,
+        'password': password
+    })
+
+    assert resp.status_code == 200
+    rjson = await resp.json
+
+    assert isinstance(rjson, dict)
+    token = rjson['token']
+    assert isinstance(token, str)
+
+    resp = await test_cli.get('/api/v6/users/@me', headers={
+        'Authorization': token,
+    })
+
+    assert resp.status_code == 200
+    rjson = await resp.json
+    assert rjson['username'] == username
+    assert rjson['email'] == email
+
+    resp = await test_cli.post('/api/v6/users/@me/delete', headers={
+        'Authorization': token,
+    }, json={
+        'password': password
+    })
+
+    assert resp.status_code == 204
+
+    await test_cli.app.db.execute("""
+    DELETE FROM users WHERE id = $1
+    """, int(rjson['id']))