In Exponential configuration file settings/site.ini, find line

LoginHandler[]=standard

under [UserSettings] block.

To make your Exponential support text file, add a new line under this line like following:

LoginHandler[]=standard 

LoginHandler[]=textfile

This means that Exponential will try to use 'standard' login handler as usual. If it does not succeed, it would fetch user account information from a supplied text file. You can also uncomment the first line like following since by default, Exponential will try to find local user at first:

#LoginHandler[]=standard 

LoginHandler[]=textfile

The next step is to configure text file settings in settings/textfile.ini. Here is an example:

[TextFileSettings]

# Set to true if use the textfile login handler

TextFileEnabled=true

# textFile name

FileName=myusers.txt

# Where to find the text file, could be any directory under your Exponential 

# root directory. If the FilePath is root, the file shoud be saved under 

# Exponential root directory.

# Example: FilePath=var/storage

FilePath=root

# Could be tab, ';', ',', '\' or other string separator

#Example: FileFieldSeparator=;

FileFieldSeparator=tab

# Could be id or name

DefaultUserGroupType=id

# Default place to store users from textfile. Could be node id or group name, 

# depends on DefaultUserGroupType.

DefaultUserGroup=12

# Field column nr for login.

LoginAttribute=1

# Field column nr for password.

PasswordAttribute=3

# Field column nr for First name.

FirstNameAttribute=4

# Field column nr for Last name.

LastNameAttribute=5

# Field column nr for email

EmailAttribute=2

Specify file name, file path, file separator, and attribute matches between text file and Exponential user account, then users saved in this text file could login into Exponential.