diff --git a/.golangci.yml b/.golangci.yml
index db2ad414..110b428f 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -162,6 +162,4 @@ formatters:
       extra-rules: true
     goimports:
       local-prefixes:
-        - github.com/prometheus/common
-  exclusions:
-    generated: lax
+        - github.com/prometheus/common
\ No newline at end of file
diff --git a/config/http_config.go b/config/http_config.go
index bc906bc6..55cc5b07 100644
--- a/config/http_config.go
+++ b/config/http_config.go
@@ -136,7 +136,7 @@ func (tv *TLSVersion) String() string {
 
 // BasicAuth contains basic HTTP authentication credentials.
 type BasicAuth struct {
-	Username     string `yaml:"username" json:"username"`
+	Username     string `yaml:"username,omitempty" json:"username,omitempty"`
 	UsernameFile string `yaml:"username_file,omitempty" json:"username_file,omitempty"`
 	// UsernameRef is the name of the secret within the secret manager to use as the username.
 	UsernameRef  string `yaml:"username_ref,omitempty" json:"username_ref,omitempty"`
@@ -238,22 +238,22 @@ func (u URL) MarshalJSON() ([]byte, error) {
 
 // OAuth2 is the oauth2 client configuration.
 type OAuth2 struct {
-	ClientID         string `yaml:"client_id" json:"client_id"`
-	ClientSecret     Secret `yaml:"client_secret" json:"client_secret"`
-	ClientSecretFile string `yaml:"client_secret_file" json:"client_secret_file"`
+	ClientID         string `yaml:"client_id,omitempty" json:"client_id,omitempty"`
+	ClientSecret     Secret `yaml:"client_secret,omitempty" json:"client_secret,omitempty"`
+	ClientSecretFile string `yaml:"client_secret_file,omitempty" json:"client_secret_file,omitempty"`
 	// ClientSecretRef is the name of the secret within the secret manager to use as the client
 	// secret.
-	ClientSecretRef          string `yaml:"client_secret_ref" json:"client_secret_ref"`
-	ClientCertificateKeyID   string `yaml:"client_certificate_key_id" json:"client_certificate_key_id"`
-	ClientCertificateKey     Secret `yaml:"client_certificate_key" json:"client_certificate_key"`
-	ClientCertificateKeyFile string `yaml:"client_certificate_key_file" json:"client_certificate_key_file"`
+	ClientSecretRef          string `yaml:"client_secret_ref,omitempty" json:"client_secret_ref,omitempty"`
+	ClientCertificateKeyID   string `yaml:"client_certificate_key_id,omitempty" json:"client_certificate_key_id,omitempty"`
+	ClientCertificateKey     Secret `yaml:"client_certificate_key,omitempty" json:"client_certificate_key,omitempty"`
+	ClientCertificateKeyFile string `yaml:"client_certificate_key_file,omitempty" json:"client_certificate_key_file,omitempty"`
 	// ClientCertificateKeyRef is the name of the secret within the secret manager to use as the client
 	// secret.
-	ClientCertificateKeyRef string `yaml:"client_certificate_key_ref" json:"client_certificate_key_ref"`
+	ClientCertificateKeyRef string `yaml:"client_certificate_key_ref,omitempty" json:"client_certificate_key_ref,omitempty"`
 	// GrantType is the OAuth2 grant type to use. It can be one of
 	// "client_credentials" or "urn:ietf:params:oauth:grant-type:jwt-bearer" (RFC 7523).
 	// Default value is "client_credentials"
-	GrantType string `yaml:"grant_type" json:"grant_type"`
+	GrantType string `yaml:"grant_type,omitempty" json:"grant_type,omitempty"`
 	// SignatureAlgorithm is the RSA algorithm used to sign JWT token. Only used if
 	// GrantType is set to "urn:ietf:params:oauth:grant-type:jwt-bearer".
 	// Default value is RS256 and valid values RS256, RS384, RS512
@@ -271,7 +271,7 @@ type OAuth2 struct {
 	// GrantType is set to "urn:ietf:params:oauth:grant-type:jwt-bearer".
 	Claims         map[string]interface{} `yaml:"claims,omitempty" json:"claims,omitempty"`
 	Scopes         []string               `yaml:"scopes,omitempty" json:"scopes,omitempty"`
-	TokenURL       string                 `yaml:"token_url" json:"token_url"`
+	TokenURL       string                 `yaml:"token_url,omitempty" json:"token_url,omitempty"`
 	EndpointParams map[string]string      `yaml:"endpoint_params,omitempty" json:"endpoint_params,omitempty"`
 	TLSConfig      TLSConfig              `yaml:"tls_config,omitempty"`
 	ProxyConfig    `yaml:",inline"`