message: spit out logs for creating REST users to figure out what is going on with the CI server
diff: @@ -35,11 +35,12 @@ module.exports = class RestSessionCreator {
  async createSession(username, password) {
  await this._register(username, password);
  + console.log(` * created REST user ${username} ... done`);
  const authResult = await this._authenticate(username, password);
  return new RestSession(authResult);
  }
  - _register(username, password) {
  + async _register(username, password) {
  const registerArgs = [
  '-c homeserver.yaml',
  `-u ${username}`,
  @@ -55,11 +56,14 @@ module.exports = class RestSessionCreator {
  registerCmd
  ].join(';');
  - return exec(allCmds, {cwd: this.cwd, encoding: 'utf-8'}).catch((result) => {
  + try {
  + await exec(allCmds, {cwd: this.cwd, encoding: 'utf-8'});
  + } catch (result) {
  const lines = result.stdout.trim().split('\n');
  const failureReason = lines[lines.length - 1];
  - throw new Error(`creating user ${username} failed: ${failureReason}`);
  - });
  + const logs = (await exec("tail -n 100 synapse/installations/consent/homeserver.log")).stdout;
  + throw new Error(`creating user ${username} failed: ${failureReason}, synapse logs:\n${logs}`);
  + }
  }
  async _authenticate(username, password) {
  