[OMERO.server][OMERO.searcher] Check if a user exists in the OMERO.server

isuser.sh

#!/bin/bash

if [ "$#" -ne 1 ]; then
  echo "Usage: $0 <username>" >&2
  exit 1
fi

USERNAME=$1
TEMP=`omero user list | grep "$USERNAME"`
if [ -z "$TEMP" ]; then echo false; else echo true; fi