fix(breaking): update the credentials filename

Save the credentials to the credentials.json file in the config
directory.

README.asciidoc

@@ -177,7 +177,7 @@ image::assets/images/consent_form.png[A screenshot of the consent form]
 6. Paste the token into the prompt and press `ENTER`.
 Enbas will then exchange the token for an access token which will be used to authentication to the
 GTS server on your behalf.
-Enbas will then verify the access token, save the credentials to a file in your configuration directory,
+Enbas will then verify the access token, save the credentials to the `credentials.json` file in your configuration directory,
 and confirm that you have successfully logged into your account.
 +
 [source,console]

cmd/enbas/login.go

@@ -48,11 +48,11 @@ func (c *loginCommand) Execute() error {
 		instance = instance[:len(instance)-1]
 	}
 
-	authentication := config.Authentication{
+	credentials := config.Credentials{
 		Instance: instance,
 	}
 
-	gtsClient := client.NewClient(authentication)
+	gtsClient := client.NewClient(credentials)
 
 	if err := gtsClient.Register(); err != nil {
 		return fmt.Errorf("unable to register the application; %w", err)
@@ -91,7 +91,7 @@ Once you have the code please copy and paste it below.
 		return fmt.Errorf("unable to verify the credentials; %w", err)
 	}
 
-	loginName, err := config.SaveAuthentication(account.Username, gtsClient.Authentication)
+	loginName, err := config.SaveCredentials(account.Username, gtsClient.Authentication)
 	if err != nil {
 		return fmt.Errorf("unable to save the authentication details; %w", err)
 	}

internal/client/client.go

@@ -15,7 +15,7 @@ import (
 )
 
 type Client struct {
-	Authentication config.Authentication
+	Authentication config.Credentials
 	HTTPClient     http.Client
 	UserAgent      string
 	Timeout        time.Duration
@@ -27,12 +27,12 @@ func NewClientFromConfig() (*Client, error) {
 		return nil, fmt.Errorf("unable to get the authentication configuration; %w", err)
 	}
 
-	currentAuthentication := config.Authentications[config.CurrentAccount]
+	currentAuthentication := config.Credentials[config.CurrentAccount]
 
 	return NewClient(currentAuthentication), nil
 }
 
-func NewClient(authentication config.Authentication) *Client {
+func NewClient(authentication config.Credentials) *Client {
 	httpClient := http.Client{}
 
 	gtsClient := Client{

internal/config/credentials.go

@@ -11,33 +11,37 @@ import (
 	"codeflow.dananglin.me.uk/apollo/enbas/internal"
 )
 
-type AuthenticationConfig struct {
+const (
+	credentialsFileName = "credentials.json"
+)
+
+type CredentialsConfig struct {
 	CurrentAccount string                 `json:"currentAccount"`
-	Authentications map[string]Authentication `json:"authentications"`
+	Credentials    map[string]Credentials `json:"credentials"`
 }
 
-type Authentication struct {
+type Credentials struct {
 	Instance     string `json:"instance"`
 	ClientID     string `json:"clientId"`
 	ClientSecret string `json:"clientSecret"`
 	AccessToken  string `json:"accessToken"`
 }
 
-func SaveAuthentication(username string, authentication Authentication) (string, error) {
+func SaveCredentials(username string, credentials Credentials) (string, error) {
 	if err := ensureConfigDir(); err != nil {
 		return "", fmt.Errorf("unable to ensure the configuration directory; %w", err)
 	}
 
-	var authConfig AuthenticationConfig
+	var authConfig CredentialsConfig
 
-	filepath := authenticationConfigFile()
+	filepath := credentialsConfigFile()
 
 	if _, err := os.Stat(filepath); err != nil {
 		if !errors.Is(err, os.ErrNotExist) {
 			return "", fmt.Errorf("unknown error received when running stat on %s; %w", filepath, err)
 		}
 
-		authConfig.Authentications = make(map[string]Authentication)
+		authConfig.Credentials = make(map[string]Credentials)
 	} else {
 		authConfig, err = NewAuthenticationConfigFromFile()
 		if err != nil {
@@ -47,38 +51,38 @@ func SaveAuthentication(username string, authentication Authentication) (string,
 
 	instance := ""
 
-	if strings.HasPrefix(authentication.Instance, "https://") {
-		instance = strings.TrimPrefix(authentication.Instance, "https://")
-	} else if strings.HasPrefix(authentication.Instance, "http://") {
-		instance = strings.TrimPrefix(authentication.Instance, "http://")
+	if strings.HasPrefix(credentials.Instance, "https://") {
+		instance = strings.TrimPrefix(credentials.Instance, "https://")
+	} else if strings.HasPrefix(credentials.Instance, "http://") {
+		instance = strings.TrimPrefix(credentials.Instance, "http://")
 	}
 
 	authenticationName := username + "@" + instance
 
 	authConfig.CurrentAccount = authenticationName
 
-	authConfig.Authentications[authenticationName] = authentication
+	authConfig.Credentials[authenticationName] = credentials
 
-	if err := saveAuthenticationFile(authConfig); err != nil {
+	if err := saveCredentialsConfigFile(authConfig); err != nil {
 		return "", fmt.Errorf("unable to save the authentication configuration to file; %w", err)
 	}
 
 	return authenticationName, nil
 }
 
-func NewAuthenticationConfigFromFile() (AuthenticationConfig, error) {
-	path := authenticationConfigFile()
+func NewAuthenticationConfigFromFile() (CredentialsConfig, error) {
+	path := credentialsConfigFile()
 
 	file, err := os.Open(path)
 	if err != nil {
-		return AuthenticationConfig{}, fmt.Errorf("unable to open %s, %w", path, err)
+		return CredentialsConfig{}, fmt.Errorf("unable to open %s, %w", path, err)
 	}
 	defer file.Close()
 
-	var authConfig AuthenticationConfig
+	var authConfig CredentialsConfig
 
 	if err := json.NewDecoder(file).Decode(&authConfig); err != nil {
-		return AuthenticationConfig{}, fmt.Errorf("unable to decode the JSON data; %w", err)
+		return CredentialsConfig{}, fmt.Errorf("unable to decode the JSON data; %w", err)
 	}
 
 	return authConfig, nil
@@ -90,21 +94,21 @@ func UpdateCurrentAccount(account string) error {
 		return fmt.Errorf("unable to retrieve the existing authentication configuration; %w", err)
 	}
 
-	if _, ok := authConfig.Authentications[account]; !ok {
+	if _, ok := authConfig.Credentials[account]; !ok {
 		return fmt.Errorf("account %s is not found", account)
 	}
 
 	authConfig.CurrentAccount = account
 
-	if err := saveAuthenticationFile(authConfig); err != nil {
+	if err := saveCredentialsConfigFile(authConfig); err != nil {
 		return fmt.Errorf("unable to save the authentication configuration to file; %w", err)
 	}
 
 	return nil
 }
 
-func authenticationConfigFile() string {
-	return filepath.Join(configDir(), "authentications.json")
+func credentialsConfigFile() string {
+	return filepath.Join(configDir(), credentialsFileName)
 }
 
 func configDir() string {
@@ -132,8 +136,8 @@ func ensureConfigDir() error {
 	return nil
 }
 
-func saveAuthenticationFile(authConfig AuthenticationConfig) error {
-	file, err := os.Create(authenticationConfigFile())
+func saveCredentialsConfigFile(authConfig CredentialsConfig) error {
+	file, err := os.Create(credentialsConfigFile())
 	if err != nil {
 		return fmt.Errorf("unable to open the config file; %w", err)
 	}

internal/model/account.go

@@ -77,8 +77,8 @@ func (a Account) String() string {
 %s %s
 
 %s
-  %s
-`
+  %s`
+
 	metadata := ""
 
 	for _, field := range a.Fields {