optargs issue

optargs.sh

#!/bin/bash

usage_message=" Usage: sudo bash start-registry.sh -u [HT_USER] -p [HT_PASS]"

if (($# == 0)); then
  echo "Missing opts."
  echo "$usage_message"
  exit 1
fi

while getopts :u:p opt; do
  case $opt in
    u)
      echo "$OPTARG"
      HT_USER="$OPTARG" >&2
      ;;
    p)
      echo "$OPTARG"
      HT_PASS="$OPTARG" >&2
      ;;
    \?)
      echo "Bad argument."
      echo "$usage_message" >&2
      exit 1
      ;;
    :)
      echo "The -$OPTARG requires argument." >&2
      exit 1
      ;;
  esac
done

echo "HT_USER: $HT_USER"
echo "HT_PASS: $HT_PASS"