Managing Workspaces - Beginning Oracle Application Express 4.2 - page 457

On the Create Multiple Users page, you need to provide an e-mail address for each
user. The e-mail addresses can be delimited by commas, semicolons, or new lines.
APEX generates the usernames from the e-mail addresses that you enter. For example,
the e-mail address [e-mail] yields as a username either
[e-mail] or just plain stephanie. You can specify whether you
wish each e-mail address to translate directly into a username, or whether you want the
usernames to exclude the @domain suffixes. Figure 14-22 shows the radio button set
for the latter option.
Figure 14-22. Create Multiple Users page