% --- start of displayed preamble in the book ---

% --- start of displayed preamble in the book ---
input metauml
% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
Usecase.U("Authenticate user",
"by name, password");
U.c=(0,0);
drawObject(U);
endfig;
end;