The problem is in don't insert value in the table.
I check consult of SQL Server for insert values for the of type date time by not solved problem.
USE [NameTable]
GO
INSERT INTO [dbo].[User]
([UserSID]
,[ApplicationSID]
,[Username]
,[Email]
,[Password]
,[PasswordQuestion]
,[PasswordAnswer]
,[IsApproved]
,[IsOnline]
,[IsLockedOut]
,[LastLockedOutDate]
,[FailedPasswordAttemptCount]
,[FailedPasswordAttemptWindowStart]
,[FailedPasswordAnswerAttemptCount]
,[FailedPasswordAnswerAttemptWindowStart]
,[Comment]
,[CreationDate]
,[LastActivityDate]
,[LastLoginDate]
,[LastPasswordChangedDate]
,[LastChangedUser]
,[LastChangedDate])
VALUES
('db0a4054-5efe-4945-bd08-ba057cd7990f'
,'F830DCF0-7D82-4FC1-B258-0502D0F00029'
,'lvillarroel'
,'lvv_umss@gmail.com'
,'vcaMiL4tVmj4wyXhTw/ISz344maPUDzcV2z8SFVKMF0='
,'NULL'
,'NULL'
,1
,0
,0
,'2019-01-14T18:10:40'
,0
,'NULL'
,0
,'NULL'
,''
,'2019-01-14T18:10:40'
,'NULL'
,'NULL'
,'NULL'
,'db0a4054-5efe-4945-bd08-ba057cd7990f'
,'NULL')
GO
The result is a message
Msg 241, Level 16, State 1, Line 4
Conversion failed when converting date and/or time from character string.