provide timeout option and lower default

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

options.go

@@ -1,6 +1,8 @@
 package vault
 
 import (
+	"time"
+
 	"github.com/hashicorp/vault/api"
 	"github.com/unistack-org/micro/v3/config"
 )
@@ -40,3 +42,9 @@ type secretIDKey struct{}
 func SecretID(secret string) config.Option {
 	return config.SetOption(secretIDKey{}, secret)
 }
+
+type timeoutKey struct{}
+
+func Timeout(td time.Duration) config.Option {
+	return config.SetOption(timeoutKey{}, td)
+}

vault.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"time"
 
 	"github.com/hashicorp/vault/api"
 	"github.com/imdario/mergo"
@@ -36,6 +37,7 @@ func (c *vaultConfig) Init(opts ...config.Option) error {
 	}
 
 	cfg := api.DefaultConfig()
+	cfg.Timeout = 3 * time.Second
 	path := ""
 	token := ""
 	roleID := ""
@@ -46,6 +48,10 @@ func (c *vaultConfig) Init(opts ...config.Option) error {
 			cfg = v
 		}
 
+		if v, ok := c.opts.Context.Value(timeoutKey{}).(time.Duration); ok {
+			cfg.Timeout = v
+		}
+
 		if v, ok := c.opts.Context.Value(addrKey{}).(string); ok {
 			cfg.Address = v
 		}