feat(modem): method to configure APN/authentication

reach/client/protocol/v2/internal.go

@@ -162,3 +162,13 @@ func (o *Operations) GetConfiguration(ctx context.Context) (*model.Configuration
 
 	return config, nil
 }
+
+func (o *Operations) PostModem(ctx context.Context, config *model.ModemAuthentication) (*model.ModemAuthentication, error) {
+	var updated model.ModemAuthentication
+
+	if err := o.PostJSON("/modem/1/settings", config, &updated); err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return &updated, nil
+}

reach/client/protocol/v2/model/modem.go

@@ -0,0 +1,12 @@
+package model
+
+// type : null, pap_chap, pap, chap
+// if type selected, username and password are mandatory
+type ModemAuthentication struct {
+	Authentication struct {
+		Apn      string `json:"apn"`
+		Type     string `json:"type,omitempty"`
+		Username string `json:"username,omitempty"`
+		Password string `json:"password,omitempty"`
+	} `json:"authentication"`
+}

reach/client/protocol/v2/operations.go

@@ -362,4 +362,31 @@ func (o *Operations) SetBaseCorrections(ctx context.Context, funcs ...protocol.S
 
 	return nil
 }
+
+// SetModem implements protocol.Operations.
+func (o *Operations) SetModem(ctx context.Context, funcs ...protocol.SetModemOptionsFunc) error {
+	opts := protocol.NewSetModemOptions(funcs...)
+	modem := &model.ModemAuthentication{}
+	if opts.Apn != nil {
+		modem.Authentication.Apn = *opts.Apn
+	}
+
+	if opts.Type != nil {
+		modem.Authentication.Type = *opts.Type
+	}
+
+	if opts.Password != nil {
+		modem.Authentication.Password = *opts.Password
+	}
+
+	if opts.Username != nil {
+		modem.Authentication.Username = *opts.Username
+	}
+
+	if _, err := o.PostModem(ctx, modem); err != nil {
+		return errors.WithStack(err)
+	}
+	return nil
+}
+
 var _ protocol.Operations = &Operations{}