diff --git a/README.md b/README.md
index 5c20c7a..e7a2783 100644
--- a/README.md
+++ b/README.md
@@ -24,49 +24,43 @@ USAGE
 <!-- usagestop -->
 # Commands
 <!-- commands -->
-* [`kot checkin [FILE]`](#kot-checkin-file)
-* [`kot checkout [FILE]`](#kot-checkout-file)
+* [`kot checkin`](#kot-checkin)
+* [`kot checkout`](#kot-checkout)
 * [`kot help [COMMANDS]`](#kot-help-commands)
 
-## `kot checkin [FILE]`
+## `kot checkin`
 
-describe the command here
+Check in
 
 ```
 USAGE
-  $ kot checkin [FILE] [-n <value>] [-f]
-
-ARGUMENTS
-  FILE  file to read
+  $ kot checkin --token <value> --user-token <value>
 
 FLAGS
-  -f, --force
-  -n, --name=<value>  name to print
+  --token=<value>       (required) Defaults to the KINGOFTIME_TOKEN environment variable.
+  --user-token=<value>  (required) Defaults to the KINGOFTIME_USER_TOKEN environment variable.
 
 DESCRIPTION
-  describe the command here
+  Check in
 
 EXAMPLES
   $ kot checkin
 ```
 
-## `kot checkout [FILE]`
+## `kot checkout`
 
-describe the command here
+Check out
 
 ```
 USAGE
-  $ kot checkout [FILE] [-n <value>] [-f]
-
-ARGUMENTS
-  FILE  file to read
+  $ kot checkout --token <value> --user-token <value>
 
 FLAGS
-  -f, --force
-  -n, --name=<value>  name to print
+  --token=<value>       (required) Defaults to the KINGOFTIME_TOKEN environment variable.
+  --user-token=<value>  (required) Defaults to the KINGOFTIME_USER_TOKEN environment variable.
 
 DESCRIPTION
-  describe the command here
+  Check out
 
 EXAMPLES
   $ kot checkout
diff --git a/src/commands/checkin.ts b/src/commands/checkin.ts
index ec2ee5b..1a0cce5 100644
--- a/src/commands/checkin.ts
+++ b/src/commands/checkin.ts
@@ -1,30 +1,18 @@
-import {Args, Command, Flags} from '@oclif/core'
+import {Command} from '@oclif/core'
+import {tokenFlags} from '../tokenFlags'
 
-export default class Checkin extends Command {
-  static description = 'describe the command here'
+export default class Checkout extends Command {
+  static description = 'Check in'
 
   static examples = [
     '<%= config.bin %> <%= command.id %>',
   ]
 
-  static flags = {
-    // flag with a value (-n, --name=VALUE)
-    name: Flags.string({char: 'n', description: 'name to print'}),
-    // flag with no value (-f, --force)
-    force: Flags.boolean({char: 'f'}),
-  }
-
-  static args = {
-    file: Args.string({description: 'file to read'}),
-  }
+  static flags = tokenFlags
 
   public async run(): Promise<void> {
-    const {args, flags} = await this.parse(Checkin)
-
-    const name = flags.name ?? 'world'
-    this.log(`hello ${name} from src/commands/checkin.ts`)
-    if (args.file && flags.force) {
-      this.log(`you input --force and --file: ${args.file}`)
-    }
+    const {flags} = await this.parse(Checkout)
+    console.log(`token: ${flags.token}`)
+    console.log(`userToken: ${flags.userToken}`)
   }
 }
diff --git a/src/commands/checkout.ts b/src/commands/checkout.ts
index b9f13ac..a3cedf3 100644
--- a/src/commands/checkout.ts
+++ b/src/commands/checkout.ts
@@ -1,30 +1,18 @@
-import {Args, Command, Flags} from '@oclif/core'
+import {Command, Flags} from '@oclif/core'
+import {tokenFlags} from '../tokenFlags'
 
 export default class Checkout extends Command {
-  static description = 'describe the command here'
+  static description = 'Check out'
 
   static examples = [
     '<%= config.bin %> <%= command.id %>',
   ]
 
-  static flags = {
-    // flag with a value (-n, --name=VALUE)
-    name: Flags.string({char: 'n', description: 'name to print'}),
-    // flag with no value (-f, --force)
-    force: Flags.boolean({char: 'f'}),
-  }
-
-  static args = {
-    file: Args.string({description: 'file to read'}),
-  }
+  static flags = tokenFlags
 
   public async run(): Promise<void> {
-    const {args, flags} = await this.parse(Checkout)
-
-    const name = flags.name ?? 'world'
-    this.log(`hello ${name} from src/commands/checkout.ts`)
-    if (args.file && flags.force) {
-      this.log(`you input --force and --file: ${args.file}`)
-    }
+    const {flags} = await this.parse(Checkout)
+    console.log(`token: ${flags.token}`)
+    console.log(`userToken: ${flags.userToken}`)
   }
 }
diff --git a/src/tokenFlags.ts b/src/tokenFlags.ts
new file mode 100644
index 0000000..b8cc04c
--- /dev/null
+++ b/src/tokenFlags.ts
@@ -0,0 +1,17 @@
+import {Flags} from '@oclif/core'
+
+const tokenVar = 'KINGOFTIME_TOKEN'
+const userTokenVar = 'KINGOFTIME_USER_TOKEN'
+
+export const tokenFlags = {
+  token: Flags.string({
+    env: tokenVar,
+    description: `Defaults to the ${tokenVar} environment variable.`,
+    required: true
+  }),
+  'user-token': Flags.string({
+    env: userTokenVar,
+    description: `Defaults to the ${userTokenVar} environment variable.`,
+    required: true
+  })
+}