authenticate: support reloading IDP settings (#1273)

* identity: add name method to provider

* authenticate: support dynamically loading the provider

internal/identity/oidc/azure/microsoft.go

@@ -47,3 +47,8 @@ func New(ctx context.Context, o *oauth.Options) (*Provider, error) {
 
 	return &p, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}

internal/identity/oidc/gitlab/gitlab.go

@@ -45,3 +45,8 @@ func New(ctx context.Context, o *oauth.Options) (*Provider, error) {
 
 	return &p, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}

internal/identity/oidc/google/google.go

@@ -53,3 +53,8 @@ func New(ctx context.Context, o *oauth.Options) (*Provider, error) {
 	}
 	return &p, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}

internal/identity/oidc/oidc.go

@@ -239,3 +239,8 @@ func (p *Provider) GetSubject(v interface{}) (string, error) {
 	}
 	return s.Subject, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}

internal/identity/oidc/okta/okta.go

@@ -33,3 +33,8 @@ func New(ctx context.Context, o *oauth.Options) (*Provider, error) {
 
 	return &p, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}

internal/identity/oidc/onelogin/onelogin.go

@@ -44,3 +44,8 @@ func New(ctx context.Context, o *oauth.Options) (*Provider, error) {
 	p.Provider = genericOidc
 	return &p, nil
 }
+
+// Name returns the provider name.
+func (p *Provider) Name() string {
+	return Name
+}