Regex that will extract the string between two known strings

Question

I'd like to extract the email addresses from the following input text:

    Junk
    more junk
    Members:
     member: user1@somedomain.com (user)
     member: user2@somedomain.com (user)
     member: user3@somedomain.com (user)
     member: user4@somedomain.com (user)
     member: user5@somedomain.com (user)
     member: user6@somedomain.com (user)
    even more junk

The addresses are consistently found between " member: " and " (user)". The following expression output an array of email addresses in an online regex tester:

    /  member: (.*) /gi

I took the expression and made a function that matches the appropriate lines but includes "member: " in the output.

    function test() {
      var str = 'Junk\nmore junk\nMembers:\n member: user1@somedomain.com (user)\n member: user2@somedomain.com (user)\n member: user3@somedomain.com (user)\n member: user4@somedomain.com (user)\n member: user5@somedomain.com (user)\n member: user6@somedomain.com (user)\neven more junk';
      var test = str.match(/ member: (.*) /gi);
    }

    Output: 
    [ member: user1@somedomain.com ,  member: user2@somedomain.com ,  member: user3@somedomain.com ,  member: user4@somedomain.com ,  member: user5@somedomain.com ,  member: user6@somedomain.com ]

I am fairly new to Regex but have experimented with positive and negative lookahead, but can't seem to find a combo that works.

    Solution: 

    function regexExample() {
      var myString = 'Junk\nmore junk\nMembers:\n member: user1@somedomain.com (user)\n member: user2@somedomain.com (user)\n member: user3@somedomain.com (user)\n member: user4@somedomain.com (user)\n member: user5@somedomain.com (user)\n member: user6@somedomain.com (user)\neven more junk';
      var myRegexp = / member: (.*) /gi;
      var match = myRegexp.exec(myString);
      while (match != null) {
        Logger.log (match[1]);
        match = myRegexp.exec(myString);
      }
   }