diff --git a/src/nsls2api/api/models/person_model.py b/src/nsls2api/api/models/person_model.py
index 9b45078e..5d8ebce8 100644
--- a/src/nsls2api/api/models/person_model.py
+++ b/src/nsls2api/api/models/person_model.py
@@ -117,19 +117,22 @@ class AccountInfo(pydantic.BaseModel):
     badPwdCount: int = 0
     pwdLastSet: Optional[str] = None
     lastLogon: Optional[str] = None
-    userAccountControlFlags: List[str] = []
+    userAccountControlFlags: List[str] = pydantic.Field(default_factory=list)
     userPrincipalName: Optional[str] = None
     logonCount: int = 0
     sAMAccountName: Optional[str] = None
     sAMAccountType: Optional[str] = None
-    lastLogoff: Optional[int] = None
-    uSNCreated: int = 0
+    lastLogoff: Optional[str] = None
+    uSNCreated: Optional[int] = None
+    uSNChanged: Optional[int] = None
 
 class DirectoryInfo(pydantic.BaseModel):
     objectGUID: Optional[str] = None
     objectSid: Optional[str] = None
     primaryGroupID: Optional[str] = None
     distinguishedName: Optional[str] = None
+    whenCreated: Optional[str] = None
+    whenChanged: Optional[str] = None
 
 class AttributesInfo(pydantic.BaseModel):
     sn: Optional[str] = None
@@ -140,7 +143,7 @@ class AttributesInfo(pydantic.BaseModel):
     codePage: Optional[str] = None
     countryCode: Optional[str] = None
     instanceType: Optional[str] = None
-    objectClass: List[str] = []
+    objectClass: List[str] = pydantic.Field(default_factory=list)
 
 class LDAPUserResponse(pydantic.BaseModel):
     """Complete LDAP user data from direct LDAP query"""
@@ -150,5 +153,5 @@ class LDAPUserResponse(pydantic.BaseModel):
     identity: Optional[IdentityInfo] = None
     account: Optional[AccountInfo] = None
     directory: Optional[DirectoryInfo] = None
-    groups: List[str] = []
+    groups: List[str] = pydantic.Field(default_factory=list)
     attributes: Optional[AttributesInfo] = None
\ No newline at end of file
diff --git a/src/nsls2api/api/v1/user_api.py b/src/nsls2api/api/v1/user_api.py
index 90ad9bf6..a9bc8e2a 100644
--- a/src/nsls2api/api/v1/user_api.py
+++ b/src/nsls2api/api/v1/user_api.py
@@ -83,8 +83,8 @@ async def get_myself(request: Request, upn: str= None):
     ldap_info = await asyncio.to_thread(get_user_info,
         upn,
         settings.ldap_server,
-        settings.base_dn,
-        settings.bind_user,
+        settings.ldap_base_dn,
+        settings.ldap_bind_user,
         settings.ldap_bind_password
     )
     if not ldap_info:
diff --git a/src/nsls2api/infrastructure/config.py b/src/nsls2api/infrastructure/config.py
index 7189682e..d6d0eb55 100644
--- a/src/nsls2api/infrastructure/config.py
+++ b/src/nsls2api/infrastructure/config.py
@@ -73,8 +73,8 @@ class Settings(BaseSettings):
 
     #Whoami LDAP settings
     ldap_server: str = Field(default="ldaps://ldapproxy.nsls2.bnl.gov", alias="LDAP_SERVER")
-    base_dn: str = Field(default="dc=bnl,dc=gov", alias="BASE_DN")
-    bind_user: str = Field(default="", alias="BIND_USER")
+    ldap_base_dn: str = Field(default="dc=bnl,dc=gov", alias="LDAP_BASE_DN")
+    ldap_bind_user: str = Field(default="", alias="LDAP_BIND_USER")
     ldap_bind_password: str = Field(default="", alias="LDAP_BIND_PASSWORD")
 
 
diff --git a/src/nsls2api/services/ldap_service.py b/src/nsls2api/services/ldap_service.py
index f496c270..fcd93981 100644
--- a/src/nsls2api/services/ldap_service.py
+++ b/src/nsls2api/services/ldap_service.py
@@ -12,13 +12,13 @@ def to_hex(val):
         return binascii.hexlify(val).decode()
     return None
 
-def get_user_info(upn, ldap_server, base_dn, bind_user, bind_password):
+def get_user_info(upn, ldap_server, ldap_base_dn, ldap_bind_user, bind_password):
     conn = None 
     try:
         server = Server(ldap_server)
-        conn = Connection(server, user=bind_user, password=bind_password, auto_bind=True)
+        conn = Connection(server, user=ldap_bind_user, password=bind_password, auto_bind=True)
         search_filter = f"(&(objectclass=person)(userPrincipalName={upn}))"
-        conn.search(base_dn, search_filter, attributes=['sAMAccountName'])
+        conn.search(ldap_base_dn, search_filter, attributes=['sAMAccountName'])
 
         if not conn.entries:
             logger.warning("No entries found for the given UPN.")
@@ -30,7 +30,7 @@ def get_user_info(upn, ldap_server, base_dn, bind_user, bind_password):
             return None
 
         search_filter = f"(&(objectclass=posixaccount)(sAMAccountName={username}))"
-        conn.search(base_dn, search_filter, attributes=['*'])
+        conn.search(ldap_base_dn, search_filter, attributes=['*'])
 
         if not conn.entries:
             logger.warning("no posix entries found for the given username.")
@@ -120,14 +120,17 @@ def clean_groups(groups_val):
             "logonCount": int(user_info.get("logonCount") or 0),
             "sAMAccountName": user_info.get("sAMAccountName"),
             "sAMAccountType": user_info.get("sAMAccountType"),
-            "lastLogoff": user_info.get("lastLogoff"),
+            "lastLogoff": filetime_to_str(user_info.get("lastLogoff")),
             "uSNCreated": int(user_info.get("uSNCreated") or 0),
+            "uSNChanged": int(user_info.get("uSNChanged") or 0),
         },
         "directory": {
             "objectGUID": to_hex(user_info.get("objectGUID")),
             "objectSid": to_hex(user_info.get("objectSid")),
             "primaryGroupID": user_info.get("primaryGroupID"),
             "distinguishedName": user_info.get("distinguishedName"),
+            "whenCreated": generalized_time_to_str(user_info.get("whenCreated")),
+            "whenChanged": generalized_time_to_str(user_info.get("whenChanged")),
         },
         "groups": clean_groups(user_info.get("memberOf")),
         "attributes": {