diff --git a/pkg/npm/plugin_impl.go b/pkg/npm/plugin_impl.go
index c5be953..7e248bd 100644
--- a/pkg/npm/plugin_impl.go
+++ b/pkg/npm/plugin_impl.go
@@ -5,6 +5,13 @@
 
 package npm
 
+import (
+	"encoding/base64"
+	"fmt"
+	"net/url"
+	"strings"
+)
+
 // Settings for the Plugin.
 type Settings struct {
 	Username              string
@@ -18,6 +25,9 @@ type Settings struct {
 	Access                string
 }
 
+// globalRegistry defines the default NPM registry.
+const globalRegistry = "https://registry.npmjs.org"
+
 func (p *pluginImpl) Validate() error {
 	// Validate the Config and return an error if there are issues.
 	return nil
@@ -27,3 +37,26 @@ func (p *pluginImpl) Exec() error {
 	// Implementation of the plugin.
 	return nil
 }
+
+// npmrcContentsUsernamePassword creates the contents from a username and
+// password
+func npmrcContentsUsernamePassword(config Settings) string {
+	// get the base64 encoded string
+	authString := fmt.Sprintf("%s:%s", config.Username, config.Password)
+	encoded := base64.StdEncoding.EncodeToString([]byte(authString))
+
+	// create the file contents
+	return fmt.Sprintf("_auth = %s\nemail = %s", encoded, config.Email)
+}
+
+/// Writes npmrc contents when using a token
+func npmrcContentsToken(config Settings) string {
+	registry, _ := url.Parse(config.Registry)
+	registry.Scheme = "" // Reset the scheme to empty. This makes it so we will get a protocol relative URL.
+	registryString := registry.String()
+
+	if !strings.HasSuffix(registryString, "/") {
+		registryString = registryString + "/"
+	}
+	return fmt.Sprintf("%s:_authToken=%s", registryString, config.Token)
+}
diff --git a/pkg/npm/plugin_test.go b/pkg/npm/plugin_test.go
index dffdf4a..30e1a22 100644
--- a/pkg/npm/plugin_test.go
+++ b/pkg/npm/plugin_test.go
@@ -7,6 +7,42 @@ package npm
 
 import "testing"
 
-func TestPlugin(t *testing.T) {
-	t.Skip()
+func TestTokenRCContents(t *testing.T) {
+	settings := Settings{
+		Registry: "https://npm.someorg.com/",
+		Token:    "token",
+	}
+	actual := npmrcContentsToken(settings)
+	expected := "//npm.someorg.com/:_authToken=token"
+	if actual != expected {
+		t.Errorf("Unexpected token settings (Got: %s, Expected: %s)", actual, expected)
+	}
+
+	settings.Registry = "https://npm.someorg.com/with/path/"
+	actual = npmrcContentsToken(settings)
+	expected = "//npm.someorg.com/with/path/:_authToken=token"
+	if actual != expected {
+		t.Errorf("Unexpected token settings (Got: %s, Expected: %s)", actual, expected)
+	}
+
+	settings.Registry = globalRegistry
+	actual = npmrcContentsToken(settings)
+	expected = "//registry.npmjs.org/:_authToken=token"
+	if actual != expected {
+		t.Errorf("Unexpected token settings (Got: %s, Expected: %s)", actual, expected)
+	}
+
+	settings.Registry = "https://npm.someorg.com"
+	actual = npmrcContentsToken(settings)
+	expected = "//npm.someorg.com/:_authToken=token"
+	if actual != expected {
+		t.Errorf("Unexpected token settings (Got: %s, Expected: %s)", actual, expected)
+	}
+
+	settings.Registry = "https://npm.someorg.com/with/path"
+	actual = npmrcContentsToken(settings)
+	expected = "//npm.someorg.com/with/path/:_authToken=token"
+	if actual != expected {
+		t.Errorf("Unexpected token settings (Got: %s, Expected: %s)", actual, expected)
+	}
 }
diff --git a/plugin_test.go b/plugin_test.go
deleted file mode 100644
index ac6f6be..0000000
--- a/plugin_test.go
+++ /dev/null
@@ -1,45 +0,0 @@
-package main
-
-import (
-	"testing"
-)
-
-func TestTokenRCContents(t *testing.T) {
-	conf := Config{
-		Registry: "https://npm.someorg.com/",
-		Token:    "token",
-	}
-	actual := npmrcContentsToken(conf)
-	expected := "//npm.someorg.com/:_authToken=token"
-	if actual != expected {
-		t.Errorf("Unexpected token config (Got: %s, Expected: %s)", actual, expected)
-	}
-
-	conf.Registry = "https://npm.someorg.com/with/path/"
-	actual = npmrcContentsToken(conf)
-	expected = "//npm.someorg.com/with/path/:_authToken=token"
-	if actual != expected {
-		t.Errorf("Unexpected token config (Got: %s, Expected: %s)", actual, expected)
-	}
-
-	conf.Registry = GlobalRegistry
-	actual = npmrcContentsToken(conf)
-	expected = "//registry.npmjs.org/:_authToken=token"
-	if actual != expected {
-		t.Errorf("Unexpected token config (Got: %s, Expected: %s)", actual, expected)
-	}
-
-	conf.Registry = "https://npm.someorg.com"
-	actual = npmrcContentsToken(conf)
-	expected = "//npm.someorg.com/:_authToken=token"
-	if actual != expected {
-		t.Errorf("Unexpected token config (Got: %s, Expected: %s)", actual, expected)
-	}
-
-	conf.Registry = "https://npm.someorg.com/with/path"
-	actual = npmrcContentsToken(conf)
-	expected = "//npm.someorg.com/with/path/:_authToken=token"
-	if actual != expected {
-		t.Errorf("Unexpected token config (Got: %s, Expected: %s)", actual, expected)
-	}
-}