Cannot open database "" requested by the login. The login fled. Login failed for user 'NT AUTHORITY\SYSTEM'. in mvc

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Finally I set the pool identity on LocalSystem and thought why it might be preventing "NT AUTHRITY\SYSTEM" from opening a connection to my database. I opened up SQL Server Management Studio as the user "Administrator" and checked out the Server Roles for NT AUTHORITY\SYSTEM under "logins" section. The default server role for this user was public by default. I also checked sysadmin and refreshed my web application form.

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