diff --git a/luser/models.py b/luser/models.py
index b4244e5..4be8f93 100644
--- a/luser/models.py
+++ b/luser/models.py
@@ -13,9 +13,27 @@ class LUSER():
     '''
 
 
+    def findlastuid(self):
+        '''
+            Return the largest uidNumber attribute of all users in base
+        '''
+        self.ldapconnection.search(search_base=self.base,search_filter=f'(objectClass=inetOrgPerson)', attributes=['uidNumber'])
+
+        alluids = self.ldapconnection.response
+
+        max = 0
+
+        for i in alluids:
+            i_uid = i['attributes']['uidNumber']
+            if i_uid > max:
+                max = i_uid
+
+        return max
+
     def expandbase(self, basealt = ''):
         '''
             Extract orgnaization, name of dc object and full domain part with all dc values from base
+            basealt := string base in LDAP system where users are made, if not set the function uses base specified on creation of LUSER instance (self.base)
         '''
         # Split base string with commas to find values of organization and dc
         if basealt == '':
@@ -52,7 +70,7 @@ class LUSER():
  
         return organization, dc, dcfull, domain
 
-    def __init__(self, ldap_host, admin_user, admin_pass, base, basealt='', autoconnect=True):
+    def __init__(self, ldap_host, admin_user, admin_pass, base, basealt='', autoconnect=True, lastUID = 1000):
         self.ldap_host = ldap_host
         self.admin_user = admin_user
         self.admin_pass = admin_pass
@@ -63,12 +81,21 @@ class LUSER():
         self.alt = True
         self.autoconnect = autoconnect
         ldapserver = Server(ldap_host, use_ssl=True)
+        lastuidfound = 0
         if self.autoconnect:
             self.ldapconnection = Connection(ldapserver, admin_user, admin_pass, auto_bind=True)
+            # uid and gid of most recently registered users
+            lastuidfound = self.findlastuid()
+        else:
+            self.ldapconnection = Connection(ldapserver, admin_user, admin_pass, auto_bind=False)
+
+        if lastuidfound == 0:
+            self.lastuid = lastUID
+            self.lastgid = lastUID
+        else:
+            self.lastuid = lastuidfound 
+            self.lastgid = lastuidfound  
 
-        # uid and gid of most recently registered users
-        self.lastuid = 1337
-        self.lastgid = 1337
 
         # Set alt boolean to false if basealt not set
         if basealt == '':
@@ -115,7 +142,6 @@ class LUSER():
         self.lastuid += 1
         self.lastgid += 1
 
-
         # Add user to base 
         id = f"uid={user}"