Value returned from a function is not checked for errors before being used

Defect 98538 (STATIC_C)
Checker CHECKED_RETURN (subcategory none)
File: /src/mongo/client/connection_pool.cpp
Function mongo::ConnectionPool::acquireConnection(const mongo::HostAndPort &, mongo::Date_t, std::chrono::duration<long, std::ratio<(long)1, (long)1000>>)
/src/mongo/client/connection_pool.cpp, line: 191
Calling "authenticateInternalUser" without checking return value (as is done elsewhere 3 out of 5 times).

            conn->authenticateInternalUser();