chore: grant type is now required

src/main/java/com/twilio/http/bearertoken/ApiTokenManager.java

@@ -20,7 +20,8 @@ public class ApiTokenManager implements TokenManager {
 
     @Override
     public String fetchAccessToken() {
-        TokenCreator tokenCreator = Token.creator().setGrantType(grantType).setClientId(clientId).setClientSecret(clientSecret);
+        TokenCreator tokenCreator = Token.creator(grantType).setClientId(clientId).setClientSecret(clientSecret);
+
         if (this.code != null) tokenCreator.setCode(code);
         if (this.redirectUri != null) tokenCreator.setRedirectUri(redirectUri);
         if (this.audience != null) tokenCreator.setAudience(audience);

src/main/java/com/twilio/http/bearertoken/OrgsTokenManager.java

@@ -34,7 +34,7 @@ public OrgsTokenManager(String grantType, String clientId, String clientSecret,
     }
 
     public synchronized String fetchAccessToken(){
-        TokenCreator tokenCreator = Token.creator().setGrantType(grantType).setClientId(clientId).setClientSecret(clientSecret);
+        TokenCreator tokenCreator = Token.creator(grantType).setClientId(clientId).setClientSecret(clientSecret);
         if (this.code != null) tokenCreator.setCode(code);
         if (this.redirectUri != null) tokenCreator.setRedirectUri(redirectUri);
         if (this.audience != null) tokenCreator.setAudience(audience);

src/main/java/com/twilio/rest/oauth/v2/Authorize.java

@@ -17,13 +17,15 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonValue;
 import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.twilio.base.Resource;
 import com.twilio.base.Resource;
+import com.twilio.converter.Promoter;
 import com.twilio.exception.ApiConnectionException;
 import com.twilio.exception.ApiException;
 import com.twilio.type.*;
@@ -43,6 +45,26 @@ public static AuthorizeFetcher fetcher() {
         return new AuthorizeFetcher();
     }
 
+    public enum CodeChallengeMethod {
+        S256("S256");
+
+        private final String value;
+
+        private CodeChallengeMethod(final String value) {
+            this.value = value;
+        }
+
+        @JsonValue
+        public String toString() {
+            return value;
+        }
+
+        @JsonCreator
+        public static CodeChallengeMethod forValue(final String value) {
+            return Promoter.enumFromString(value, CodeChallengeMethod.values());
+        }
+    }
+
     /**
      * Converts a JSON String into a Authorize object using the provided ObjectMapper.
      *

src/main/java/com/twilio/rest/oauth/v2/AuthorizeFetcher.java

@@ -37,6 +37,8 @@ public class AuthorizeFetcher extends Fetcher<Authorize> {
     private String redirectUri;
     private String scope;
     private String state;
+    private String codeChallenge;
+    private Authorize.CodeChallengeMethod codeChallengeMethod;
 
     public AuthorizeFetcher() {}
 
@@ -65,6 +67,18 @@ public AuthorizeFetcher setState(final String state) {
         return this;
     }
 
+    public AuthorizeFetcher setCodeChallenge(final String codeChallenge) {
+        this.codeChallenge = codeChallenge;
+        return this;
+    }
+
+    public AuthorizeFetcher setCodeChallengeMethod(
+        final Authorize.CodeChallengeMethod codeChallengeMethod
+    ) {
+        this.codeChallengeMethod = codeChallengeMethod;
+        return this;
+    }
+
     private Response makeRequest(final TwilioRestClient client) {
         String path = "/v2/authorize";
 
@@ -159,5 +173,23 @@ private void addQueryParams(final Request request) {
         if (state != null) {
             Serializer.toString(request, "state", state, ParameterType.QUERY);
         }
+
+        if (codeChallenge != null) {
+            Serializer.toString(
+                request,
+                "code_challenge",
+                codeChallenge,
+                ParameterType.QUERY
+            );
+        }
+
+        if (codeChallengeMethod != null) {
+            Serializer.toString(
+                request,
+                "code_challenge_method",
+                codeChallengeMethod,
+                ParameterType.QUERY
+            );
+        }
     }
 }

src/main/java/com/twilio/rest/oauth/v2/Token.java

@@ -38,8 +38,8 @@
 @ToString
 public class Token extends Resource {
 
-    public static TokenCreator creator() {
-        return new TokenCreator();
+    public static TokenCreator creator(final String grantType) {
+        return new TokenCreator(grantType);
     }
 
     /**

src/main/java/com/twilio/rest/oauth/v2/TokenCreator.java

@@ -42,8 +42,11 @@ public class TokenCreator extends Creator<Token> {
     private String audience;
     private String refreshToken;
     private String scope;
+    private String codeVerifier;
 
-    public TokenCreator() {}
+    public TokenCreator(final String grantType) {
+        this.grantType = grantType;
+    }
 
     public TokenCreator setGrantType(final String grantType) {
         this.grantType = grantType;
@@ -85,6 +88,11 @@ public TokenCreator setScope(final String scope) {
         return this;
     }
 
+    public TokenCreator setCodeVerifier(final String codeVerifier) {
+        this.codeVerifier = codeVerifier;
+        return this;
+    }
+
     public TokenCreator setAccountSid(final String accountSid) {
         this.accountSid = accountSid;
         return this;
@@ -231,5 +239,14 @@ private void addPostParams(final Request request) {
                 ParameterType.URLENCODED
             );
         }
+
+        if (codeVerifier != null) {
+            Serializer.toString(
+                request,
+                "code_verifier",
+                codeVerifier,
+                ParameterType.URLENCODED
+            );
+        }
     }
 }