Only import MongoDB library if actually needed. Removes a number of dependencies for client-only usage.
Only import MongoDB library if actually needed. Removes a number of
dependencies for client-only usage.

kbase/auth,olsonanl/auth,PATRIC3/auth,kbase/auth,kbase/auth,kbase/auth,PATRIC3/auth,PATRIC3/auth,olsonanl/kbauth,mmundy42/auth,mmundy42/auth,olsonanl/auth,mmundy42/auth,olsonanl/kbauth,mmundy42/auth,olsonanl/kbauth,PATRIC3/auth,olsonanl/auth,olsonanl/auth,olsonanl/kbauth,PATRIC3/auth,olsonanl/kbauth,olsonanl/auth,kbase/auth