fix: nil pointer on incomplete config for accounts

pkg/config/config.go

@@ -236,6 +236,10 @@ func (c *Config) Filters(accountID string) (filter.Filters, error) {
 // new resource type.
 func (c *Config) ResolveDeprecations() error {
 	for _, a := range c.Accounts {
+		if a == nil {
+			return nil
+		}
+
 		// Note: if there are no filters defined, then there's no substitution to perform.
 		if a.Filters == nil {
 			return nil

pkg/config/config_test.go

@@ -233,3 +233,12 @@ func TestNoBlocklist(t *testing.T) {
 	err = c.ValidateAccount("555133742")
 	assert.Error(t, err)
 }
+
+func TestIncomplete(t *testing.T) {
+	opts := Options{
+		Path: "testdata/incomplete.yaml",
+	}
+	c, err := New(opts)
+	assert.NoError(t, err)
+	_ = c
+}

pkg/config/testdata/incomplete.yaml

@@ -0,0 +1,5 @@
+regions:
+  - global
+
+accounts:
+  "0964xxxxxxxx":