fix: resolve issues with AuthMethod implementations

Author: PhilippHeuer

feign-common/src/main/java/io/github/primelib/primecodegenlib/java/feign/common/auth/AuthSpecBase.java

@@ -1,12 +1,15 @@
 package io.github.primelib.primecodegenlib.java.feign.common.auth;
 
+import io.github.primelib.primecodegenlib.java.feign.common.api.AuthMethod;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.Setter;
+import lombok.experimental.Accessors;
 
 import java.util.Map;
 
-public abstract class AuthSpecBase {
+@Accessors(fluent = true)
+public abstract class AuthSpecBase implements AuthMethod {
     @Setter(AccessLevel.NONE)
     @Getter(AccessLevel.PUBLIC)
     protected Map<String, String> headerMap = null;

feign-common/src/main/java/io/github/primelib/primecodegenlib/java/feign/common/auth/OAuth2ClientCredentialsAuthSpec.java

@@ -1,7 +1,6 @@
 package io.github.primelib.primecodegenlib.java.feign.common.auth;
 
 import com.github.philippheuer.credentialmanager.domain.OAuth2Credential;
-import com.github.philippheuer.credentialmanager.identityprovider.DefaultOAuth2IdentityProvider;
 import com.github.philippheuer.credentialmanager.identityprovider.OAuth2IdentityProvider;
 import lombok.AccessLevel;
 import lombok.Data;
@@ -72,7 +71,7 @@ public void validate() {
     }
 
     @Override
-    public Map<String, String> getHeaderMap() {
+    public Map<String, String> headerMap() {
         if (credential == null || credential.getReceivedAt().plusSeconds(credential.getExpiresIn()).isBefore(Instant.now())) {
             refreshLock.lock();
             try {

feign-common/src/main/java/io/github/primelib/primecodegenlib/java/feign/common/auth/OAuth2UserCredentialsAuthSpec.java

@@ -81,7 +81,7 @@ public void validate() {
     }
 
     @Override
-    public Map<String, String> getHeaderMap() {
+    public Map<String, String> headerMap() {
         if (credential == null || credential.getReceivedAt().plusSeconds(credential.getExpiresIn()).isBefore(Instant.now())) {
             refreshLock.lock();
             try {