Add created_at properties for Server and User.

discord/server.py

@@ -218,3 +218,8 @@ class Server(Hashable):
     def member_count(self):
         """Returns the true member count regardless of it being loaded fully or not."""
         return self._member_count
+
+    @property
+    def created_at(self):
+        """Returns the server's creation time in UTC."""
+        return utils.snowflake_time(self.id)

discord/user.py

@@ -24,6 +24,8 @@ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
 """
 
+from .utils import snowflake_time
+
 class User:
     """Represents a Discord user.
 
@@ -102,3 +104,10 @@ class User:
         """
         return channel.permissions_for(self)
 
+    @property
+    def created_at(self):
+        """Returns the user's creation time in UTC.
+
+        This is when the user's discord account was created."""
+        return snowflake_time(self.id)
+