diff --git a/Gemfile b/Gemfile
index 059924a..1eaac2c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,4 +2,5 @@ source "https://rubygems.org"
 
 gem 'sinatra'
 gem 'sinatra-flash'
-gem 'puma'
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+gem 'puma'
+gem 'sod'
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diff --git a/bin/tauth.rb b/bin/tauth.rb
new file mode 100755
index 0000000..c761e03
--- /dev/null
+++ b/bin/tauth.rb
@@ -0,0 +1,88 @@
+#! /usr/bin/ruby
+
+require 'sod'
+
+require_relative '../lib/tonton_web/auth'
+require 'io/console'
+
+class CreateTable < Sod::Action
+	on "--create-table"
+
+	def call(*)
+		context.tauth.create_tables
+	end
+end
+
+class CreateUser < Sod::Command
+	handle "create-user"
+
+	class Username < Sod::Action
+		on "--username", argument: "USERNAME"
+
+		def call(username) = context.input[:username] = username
+	end
+
+	class Name < Sod::Action
+		on "--name", argument: "NAME"
+
+		def call(name) = context.input[:name] = name
+	end
+
+	class Email < Sod::Action
+		on "--email", argument: "EMAIL"
+
+		def call(email) = context.input[:email] = email
+	end
+
+	on Username
+	on Name
+	on Email
+
+	def call
+		context.input[:password] = IO::console.getpass("User password: ")
+
+		context.tauth.create_user(**context.input)
+	end
+end
+
+class DeleteUser < Sod::Action
+	on "--delete-user", argument: "USER_ID"
+
+	def call(user_id)
+		context.tauth.delete_user user_id
+	end
+end
+
+class Info < Sod::Command
+	handle "info"
+
+	description "Information about user."
+
+	class Username < Sod::Action
+		on "--username", argument: "TEXT"
+
+		def call text
+			puts context.tauth.find_user(username: text)
+		end
+	end
+
+	on Username
+end
+
+tauth = TonTonWeb::Auth.new Dir.getwd
+
+context = Sod::Context[tauth: tauth, input: {}]
+
+cli = Sod.new(banner: "Tauth 0.0.0: TonTon Auth") do
+	on(CreateTable, context:)
+
+	on(CreateUser, context:)
+
+	on(DeleteUser, context:)
+
+	on(Info, context:)
+
+	on Sod::Prefabs::Actions::Help, self
+end
+
+cli.call
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diff --git a/lib/tonton_web/auth.rb b/lib/tonton_web/auth.rb
new file mode 100644
index 0000000..b48a76b
--- /dev/null
+++ b/lib/tonton_web/auth.rb
@@ -0,0 +1,73 @@
+require 'pathname'
+require 'sqlite3'
+require 'bcrypt'
+
+module TonTonWeb
+	User = Struct.new(:id, :name, :username, :email, :password_digest)
+
+	class Auth
+		attr_reader :root
+
+		def initialize root_path
+			@root = Pathname.new root_path
+
+			@db = SQLite3::Database.new(@root+ 'database.sqlite')
+		end
+
+		def create_tables
+			@db.execute "create table users (id integer primary key, name text, username text, email text, password_digest text);"
+		end
+
+		def create_user **options
+			name = options.fetch :name
+			username = options.fetch :username
+			email = options.fetch :email
+			password = options.fetch :password
+
+			# Assert user doesn't exists
+
+			hashed_password = BCrypt::Password.create(password)
+
+			@db.execute(
+				"insert into users (name, username, email, password_digest) values (?,?,?,?);",
+				[name, username, email, password]
+			)
+
+			return # Return user
+		end
+
+		def delete_user id
+			@db.execute "delete from users where id = ?;", id
+		end
+
+		def find_user **options
+			name = options[:name]
+			username = options[:username]
+			email = options[:email]
+
+			if not (name or username or email)
+				raise "No options to find user."
+			end
+
+			user = nil
+
+			user_query_template = "select id, name, username, email, password_digest from users where name = ? or username = ? or email = ?"
+
+			@db.execute(user_query_template, [name, username, email]) do |row|
+				user = TonTonWeb::User.new(*row)
+			end
+
+			return user
+		end
+
+		def authenticate username, password
+			user = find_user(username: username)
+
+			if BCrypt::Password.new(user.password_digest) == password
+				return user
+			else
+				return false
+			end
+		end
+	end
+end
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